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European emission standards
European emission standards
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Simplified chart showing the progression of European emission standards for diesel cars
Simplified chart showing the progression of European emission standards for petrol cars. Note that until Euro 5, there were no PM limits.

The European emission standards are vehicle emission standards that regulate pollution from the use of new land surface vehicles sold in the European Union and European Economic Area member states and the United Kingdom, and ships in European territorial waters.[1][2] These standards target air pollution from exhaust gases, brake dust, and tyre rubber pollution, and are defined through a series of European Union directives that progressively introduce stricter limits to reduce environmental impact.

Euro 7, agreed in 2024 and due to come into force in 2026,[3][4] includes non-exhaust emissions such as particulates from tyres and brakes.[5][6][7][8] Until 2030 fossil fueled vehicles are allowed to have dirtier brakes than electric vehicles.[9]: 5 

Background

[edit]
Near surface concentration of Nitrogen Oxides (NOx)

In the European Union, emissions of nitrogen oxides (NOx), total hydrocarbon (THC), non-methane hydrocarbons (NMHC), carbon monoxide (CO) and particulate matter (PM) are regulated for most vehicle types, including cars, trucks (lorries), locomotives, tractors and similar machinery, barges, but excluding seagoing ships and aeroplanes.[10][11] For each vehicle type, different standards apply. Compliance is determined by running the engine at a standardised test cycle.[12] Non-compliant vehicles cannot be sold in the EU, but new standards do not apply to vehicles already on the roads.[13] No use of specific technologies is mandated to meet the standards, though available technology is considered when setting the standards. New models introduced must meet current or planned standards, but minor lifecycle model revisions may continue to be offered with pre-compliant engines.

Along with emissions standards, the European Union has also mandated a number of computer on-board diagnostics for the purposes of increasing safety for drivers. These standards are used in relation to the emissions standards.

During the early 2000s, Australia began harmonising Australian Design Rule certification for new motor vehicle emissions with Euro categories. Euro III was introduced on 1 January 2006 and is progressively being introduced to align with European introduction dates.

Euro 7 was formally given approval by EU countries in April 2024.[8]

[edit]

The stages are typically referred to as Euro 1, Euro 2, Euro 3, Euro 4, Euro 5 and Euro 6 for Light Duty Vehicle standards.

The legal framework consists in a series of directives, each amendments to the 1970 Directive 70/220/EEC.[14] The following is a summary list of the standards, when they come into force, what they apply to, and which EU directives provide the definition of the standard.

  • Euro 1 (1992):
    • For passenger cars—91/441/EEC.[15]
    • Also for passenger cars and light lorries—93/59/EEC.
  • Euro 2 (1996) for passenger cars—94/12/EC (& 96/69/EC)
    • For motorcycle—2002/51/EC (row A)[16]—2006/120/EC
  • Euro 3 (2000) for any vehicle—98/69/EC[17]
    • For motorcycle—2002/51/EC (row B)[16]—2006/120/EC
  • Euro 4 (2005) for any vehicle—98/69/EC (& 2002/80/EC)
  • Euro 5 (2009) for light passenger and commercial vehicles—715/2007/EC[18]
  • Euro 6 (2014) for light passenger and commercial vehicles—459/2012/EC[19] and 2016/646/EU[20]
  • Euro 7 (2030 to 2031)[21][22]

These limits supersede the original directive on emission limits 70/220/EEC.

The classifications for vehicle category are defined by:[23]

  • Commission Directive 2001/116/EC of 20 December 2001, adapting to technical progress Council Directive 70/156/EEC on the approximation of the laws of the Member States relating to the type-approval of motor vehicles and their trailers[24][25]
  • Directive 2002/24/EC of the European Parliament and of the Council of 18 March 2002 relating to the type-approval of two or three-wheeled motor vehicles and repealing Council Directive 92/61/EEC

Emission standards for passenger cars

[edit]

Emission standards for passenger cars and light commercial vehicles are summarized in the following tables. Since the Euro 2 stage, EU regulations introduce different emission limits for diesel and petrol vehicles. Diesels have more stringent CO standards but are allowed higher NOx emissions. Petrol-powered vehicles are exempted from particulate matter (PM) standards through to the Euro 4 stage, but vehicles with direct injection engines are subject to a limit of 0.0045 g/km for Euro 5 and Euro 6. A particulate number standard (P) or (PN) has been introduced in 2011 with Euro 5b for diesel engines and, in 2014, with Euro 6 for petrol engines.[26][27][28]

From a technical perspective, European emissions standards do not reflect everyday usage of the vehicle as manufacturers are allowed to lighten the vehicle by removing the back seats, improve aerodynamics by taping over grilles and door handles, or reduce the load on the generator by switching off the headlights, the passenger compartment fan, or simply disconnecting the alternator which charges the battery.[29]

European emission standards for passenger cars (Category M),[a] g/km
Tier Date (type approval) Date (first registration) CO THC NMHC NH3 NOx HC+NOx PM PN [#/km] Brake PM10[b]
Diesel
Euro 1[c] July 1992 January 1993 2.72 (3.16) – – – – 0.97 (1.13) 0.14 (0.18) – –
Euro 2 January 1996 January 1997 1.0 – – – – 0.7 0.08 – –
Euro 3 January 2000 January 2001 0.66 – – – 0.500 0.56 0.05 – –
Euro 4 January 2005 January 2006 0.50 – – – 0.250 0.30 0.025 – –
Euro 5a September 2009 January 2011 0.50 – – – 0.180 0.230 0.005 – –
Euro 5b September 2011 January 2013 0.50 – – – 0.180 0.230 0.0045 6×1011 –
Euro 6b September 2014 September 2015 0.50 – – – 0.080 0.170 0.0045 6×1011 –
Euro 6c – September 2018 0.50 – – – 0.080 0.170 0.0045 6×1011 –
Euro 6d-Temp September 2017 September 2019 0.50 – – – 0.080 0.170 0.0045 6×1011 –
Euro 6d January 2020 January 2021 0.50 – – – 0.080 0.170 0.0045 6×1011
Euro 6e September 2023 September 2024 0.50 – – – 0.080 0.170 0.0045 6×1011 –
Euro 7 0.50 – – – 0.080 0.170 0.0045 6×1011[d] 0.007
Petrol
Euro 1[c] July 1992 January 1993 2.72 (3.16) – – – – 0.97 (1.13) – – –
Euro 2 January 1996 January 1997 2.2 – – – – 0.5 – – –
Euro 3 January 2000 January 2001 2.3 0.20 – – 0.150 – – – –
Euro 4 January 2005 January 2006 1.0 0.10 – – 0.080 – – – –
Euro 5a September 2009 January 2011 1.0 0.10 0.068 – 0.060 – 0.005[e] – –
Euro 5b September 2011 January 2013 1.0 0.10 0.068 – 0.060 – 0.0045[e] – –
Euro 6b September 2014 September 2015 1.0 0.10 0.068 – 0.060 – 0.0045[e] 6×1011[f] –
Euro 6c – September 2018 1.0 0.10 0.068 – 0.060 – 0.0045[e] 6×1011 –
Euro 6d-Temp September 2017 September 2019 1.0 0.10 0.068 – 0.060 – 0.0045[e] 6×1011 –
Euro 6d January 2020 January 2021 1.0 0.10 0.068 – 0.060 – 0.0045[e] 6×1011 –
Euro 6e September 2023 September 2024 1.0 0.10 0.068 – 0.060 – 0.0045[e] 6×1011 –
  1. ^ Before Euro 5, passenger vehicles > 2,500 kg were type approved as light commercial vehicles N1 Class I
  2. ^ Brake particle emissions (PM10). Only regulated for M1, N1 vehicles and only as PM - not PN. After 2035 the limit drops to 0.003. HDV will still not be subject to brake particle emissions regulation even after 2035.
  3. ^ a b Values in parentheses are conformity of production (COP) limits
  4. ^ Particles before Euro 7 were counted if they were above 23nm, whereas Euro 7 changes this measurement to 10nm.
  5. ^ a b c d e f g Applies only to vehicles with direct injection engines
  6. ^ 6×1012/km within first three years from Euro 6b effective dates

Emission standards for motor cycles (two and three wheelers) – L-category vehicles

[edit]

The Euro emissions regulations for two and three wheelers (motorcycles) were first introduced in 1999 — some seven years after the cars were first regulated. In further difference to passenger cars (where three-way catalytic converters were de facto required from Euro I), it was first with the introduction of the Euro III emissions standard in 2006 that motorcycles were de facto required to use three-way catalytic converters. With the introduction of Euro V, standard two-stroke engine motorcycles are challenged by the strict HC and PM emissions limits. It is expected that technologies such as direct injection, combined with petrol particulate filters, could be needed for these motorcycle engine types to meet the Euro V demands.[30][31][32]

Euro emission standards for two- and three-wheelers
Standard Date CO (g/km) NOx (g/km) HC (g/km) PM (g/km) NMHC (g/km)
Euro I 1999 13.0 0.3 3.0
Euro II 2003 5.5 0.3 1.0
Euro III 2006 2.0 0.15 0.3
Euro IV 2016 1.14 0.09 0.17
Euro V 2020 1.00 0.06 0.10 0.0045 0.068
Euro V+ 2024 1.00 0.06 0.10 0.0045 0.068

Emission standards for light commercial vehicles

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European emission standards for light commercial vehicles ≤ 1,305 kg reference mass (Category N1 Class I), g/km
Tier Date (type approval) Date (first registration) CO THC NMHC NOx HC+NOx PM PN [#/km]
Diesel
Euro 1 October 1993 October 1994 2.72 – – – 0.97 0.14 –
Euro 2 January 1997 October 1997 1.0 – – – 0.7 0.08 –
Euro 3 January 2000 January 2001 0.64 – – 0.50 0.56 0.05 –
Euro 4 January 2005 January 2006 0.50 – – 0.25 0.30 0.025 –
Euro 5a September 2009 January 2011 0.500 – – 0.180 0.230 0.005 –
Euro 5b September 2011 January 2013 0.500 – – 0.180 0.230 0.0045 6×1011
Euro 6b September 2014 September 2015 0.500 – – 0.080 0.170 0.0045 6×1011
Euro 6c – September 2018 0.500 – – 0.080 0.170 0.0045 6×1011
Euro 6d-Temp September 2017 September 2019 0.500 – – 0.080 0.170 0.0045 6×1011
Euro 6d January 2020 January 2021 0.500 – – 0.080 0.170 0.0045 6×1011
Euro 6e September 2023 September 2024 0.500 – – 0.080 0.170 0.0045 6×1011
Petrol
Euro 1 October 1993 October 1994 2.72 – – – 0.97 – –
Euro 2 January 1997 October 1997 2.2 – – – 0.5 – –
Euro 3 January 2000 January 2001 2.3 0.20 – 0.15 – – –
Euro 4 January 2005 January 2006 1.0 0.10 – 0.08 – – –
Euro 5a September 2009 January 2011 1.000 0.100 0.068 0.060 – 0.005[a] –
Euro 5b September 2011 January 2013 1.000 0.100 0.068 0.060 – 0.0045[a] –
Euro 6b September 2014 September 2015 1.000 0.100 0.068 0.060 – 0.0045[a] 6×1011
Euro 6c – September 2018 1.000 0.100 0.068 0.060 – 0.0045[a] 6×1011
Euro 6d-Temp September 2017 September 2019 1.000 0.100 0.068 0.060 – 0.0045[a] 6×1011
Euro 6d January 2020 January 2021 1.000 0.100 0.068 0.060 – 0.0045[a] 6×1011
Euro 6e September 2023 September 2024 1.000 0.100 0.068 0.060 – 0.0045[a] 6×1011
  1. ^ a b c d e f g Applies only to vehicles with direct injection engines

European emission standards for light commercial vehicles 1,305–1,760 kg reference mass (Category N1 Class II), g/km
Tier Date (type approval) Date (first registration) CO THC NMHC NOx HC+NOx PM PN [#/km]
Diesel
Euro 1 October 1993 October 1994 5.17 – – – 1.4 0.19 –
Euro 2 January 1998 October 1998 1.25 – – – 1.0 0.12 –
Euro 3 January 2001 January 2002 0.80 – – 0.65 0.72 0.07 –
Euro 4 January 2006 January 2007 0.63 – – 0.33 0.39 0.04 –
Euro 5a September 2010 January 2012 0.630 – – 0.235 0.295 0.005 –
Euro 5b September 2011 January 2013 0.630 – – 0.235 0.295 0.0045 6×1011
Euro 6b September 2015 September 2016 0.630 – – 0.105 0.195 0.0045 6×1011
Euro 6c – September 2019 0.630 – – 0.105 0.195 0.0045 6×1011
Euro 6d-Temp September 2018 September 2020 0.630 – – 0.105 0.195 0.0045 6×1011
Euro 6d January 2021 January 2022 0.630 – – 0.105 0.195 0.0045 6×1011
Euro 6e September 2023 September 2024 0.630 – – 0.105 0.195 0.0045 6×1011
Petrol
Euro 1 October 1993 October 1994 5.17 – – – 1.4 – –
Euro 2 January 1998 October 1998 4.0 – – – 0.6 – –
Euro 3 January 2001 January 2002 4.17 0.25 – 0.18 – – –
Euro 4 January 2006 January 2007 1.81 0.130 – 0.10 – – –
Euro 5a September 2010 January 2012 1.810 0.130 0.090 0.075 – 0.005[a] –
Euro 5b September 2011 January 2013 1.810 0.130 0.090 0.075 – 0.0045[a] –
Euro 6b September 2015 September 2016 1.810 0.130 0.090 0.075 – 0.0045[a] 6×1011
Euro 6c – September 2019 1.810 0.130 0.090 0.075 – 0.0045[a] 6×1011
Euro 6d-Temp September 2018 September 2020 1.810 0.130 0.090 0.075 – 0.0045[a] 6×1011
Euro 6d January 2021 January 2022 1.810 0.130 0.090 0.075 – 0.0045[a] 6×1011
Euro 6e September 2023 September 2024 1.810 0.130 0.090 0.075 – 0.0045[a] 6×1011
  1. ^ a b c d e f g Applies only to vehicles with direct injection engines

European emission standards for light commercial vehicles > 1,760 kg reference mass max 3,500 kg. (Category N1 Class III & N2), g/km
Tier Date (type approval) Date (first registration) CO THC NMHC NOx HC+NOx PM PN [#/km]
Diesel
Euro 1 October 1993 October 1994 6.9 – – – 1.7 0.25 –
Euro 2 January 1998 October 1999 1.5 – – – 1.2 0.17 –
Euro 3 January 2001 January 2002 0.95 – – 0.78 0.86 0.10 –
Euro 4 January 2006 January 2007 0.74 – – 0.39 0.46 0.06 –
Euro 5a September 2010 January 2012 0.740 – – 0.280 0.350 0.005 –
Euro 5b September 2011 January 2013 0.740 – – 0.280 0.350 0.0045 6×1011
Euro 6b September 2015 September 2016 0.740 – – 0.125 0.215 0.0045 6×1011
Euro 6c – September 2019 0.740 – – 0.125 0.215 0.0045 6×1011
Euro 6d-Temp September 2018 September 2020 0.740 – – 0.125 0.215 0.0045 6×1011
Euro 6d January 2021 January 2022 0.740 – – 0.125 0.215 0.0045 6×1011
Euro 6e September 2023 September 2024 0.740 – – 0.125 0.215 0.0045 6×1011
Petrol
Euro 1 October 1993 October 1994 6.9 – – – 1.7 – –
Euro 2 January 1998 October 1999 5.0 – – – 0.7 – –
Euro 3 January 2001 January 2002 5.22 0.29 – 0.21 – – –
Euro 4 January 2006 January 2007 2.27 0.16 – 0.11 – – –
Euro 5a September 2010 January 2012 2.270 0.160 0.108 0.082 – 0.005[a] –
Euro 5b September 2011 January 2013 2.270 0.160 0.108 0.082 – 0.0045[a] –
Euro 6b September 2015 September 2016 2.270 0.160 0.108 0.082 – 0.0045[a] 6×1011
Euro 6c – September 2019 2.270 0.160 0.108 0.082 – 0.0045[a] 6×1011
Euro 6d-Temp September 2018 September 2020 2.270 0.160 0.108 0.082 – 0.0045[a] 6×1011
Euro 6d January 2021 January 2021 2.270 0.160 0.108 0.082 – 0.0045[a] 6×1011
Euro 6e September 2023 September 2024 2.270 0.160 0.108 0.082 – 0.0045[a] 6×1011
  1. ^ a b c d e f g Applies only to vehicles with direct injection engines

Emission standards for trucks and buses

[edit]
An Iveco Trakker equipped with an engine with EEV-standard

The emission standards for trucks (lorries) and buses are defined by engine energy output in g/kWh; this is unlike the emission standards for passenger cars and light commercial vehicles, which are defined by vehicle driving distance in g/km — a general comparison to passenger cars is therefore not possible, as the kWh/km factor depends, among others, on the specific vehicle.

The official category name is heavy-duty diesel engines, which generally includes lorries and buses.

The following table contains a summary of the emission standards and their implementation dates. Dates in the tables refer to new type approvals; the dates for all new registrations are in most cases one year later.

European emission standards for heavy-duty diesel engines, g/kWh
Tier Date Test cycle CO HC[a] NOx NH3[b] PM PN[c] [#/kWh] N2O CH4 HCHO Smoke [m−1] Brake PM10[d]
Euro I 1992, < 85 kW

ECE R49

4.5 1.1 8.0 0.612
1992, > 85 kW 4.5 1.1 8.0 0.36
Euro II October 1995 4.0 1.1 7.0 0.25
October 1997 4.0 1.1 7.0 0.15
Euro III October 1999 EEVs[e] only

ESC & ELR

1.5 0.25 2.0 0.02 0.15
October 2000 2.1 0.66 5.0 0.10
0.13[f] 		0.8
Euro IV October 2005 1.5 0.46 3.5 0.02 0.5
Euro V October 2008 1.5 0.46 2.0 0.02 0.5
Euro VI 31 December 2012[34] WHSC 1.5 0.13 0.4 10 (ppm) 0.01 8×1011
WHTC 4.0 0.16 0.46 10 (ppm) 0.01 6×1011
  1. ^ In EURO VI, HC has been replaced by the measurement of “THC” – Total HydroCarbons. HC and THC are not necessarily completely comparable values.
  2. ^ EURO VI limits NH3 measured in ppm pr. kWh, whereas EURO VII limits NH3 measured in mg pr. kWh.
    The EURO VII limit values for NH3 listed in this table have been recalculated from mg to g.
    A limited 2023 study has shown that certain EURO VI, Step D buses are able to meet the EURO VII NH3 limits.[33]
  3. ^ In Euro VII, “PN” includes smaller particles sizes. The cut off value is lowered from PN23 to PN10. This means that PN in EURO VII includes particulates down to 10 nm as opposed to only down to 23 nm in Euro VI.
  4. ^ Brake particle emissions (PM10). Only regulated for M1, N1 vehicles and only as PM - not PN. After 2035 HDV will still not be subject to brake particle emissions regulation.
  5. ^ enhanced environmentally friendly vehicle
  6. ^ for engines of less than 0.75 litres swept volume per cylinder and a rated power speed of more than 3,000 per minute.

Emission standards for large goods vehicles

[edit]
Euro norm emissions for category N3, EDC, (2000 and up), g/kWh
Standard Date CO NOx HC PM
Euro 0 1988–92 12.3 15.8 2.6 NA
Euro I 1992–95 4.9 9.0 1.23 0.40
Euro II 1995–99 4.0 7.0 1.1 0.15
Euro III 1999–2005 2.1 5.0 0.66 0.1
Euro IV 2005–08 1.5 3.5 0.46 0.02
Euro V 2008–12 1.5 2.0 0.46 0.02
Euro VI 2012–19 1.0 1.2 0.36 0.01
Euro norm emissions for (older) ECE R49 cycle, g/kWh
Standard Date CO NOx HC PM
Euro 0 1988–92 11.2 14.4 2.4 NA
Euro I 1992–95 4.5 8.0 1.1 0.36
Euro II 1995–99 4.0 7.0 1.1 0.15

Emission standards for non-road mobile machinery

[edit]

The term non-road mobile machinery (NRMM) is a term used in the European emission standards to control emissions of engines that are not used primarily on public roadways. This definition includes off-road vehicles as well as railway vehicles.

European standards for non-road diesel engines harmonise with the US EPA standards, and comprise gradually stringent tiers known as Stage I–V standards. The Stage I/II was part of the 1997 directive (Directive 97/68/EC). It was implemented in two stages, with Stage I implemented in 1999 and Stage II implemented between 2001 and 2004. In 2004, the European Parliament adopted Stage III/IV standards. The Stage III standards were further divided into Stage III A and III B, and were phased in between 2006 and 2013. Stage IV standards are enforced from 2014. Stage V standards are phased in from 2018 with full enforcement from 2021.

As of 1 January 2015, EU Member States have to ensure that ships in the Baltic, the North Sea and the English Channel are using fuels with a sulphur content of no more than 0.10%. Higher sulphur contents are still possible, but only if the appropriate exhaust cleaning systems are in place.[35]

Emission test cycle

[edit]

Just as important as the regulations are the tests needed to ensure adherence to regulations. These are laid out in standardised emission test cycles used to measure emissions performance against the regulatory thresholds applicable to the tested vehicle.

Light duty vehicles

[edit]

Since the Euro 3 regulations in 2000, performance has been measured using the New European Driving Cycle test (NEDC; also known as MVEG-B), with a "cold start" procedure that eliminates the use of a 40-second engine warm-up period found in the ECE+EUDC test cycle (also known as MVEG-A).[27][36] Since 2017 the NEDC was replaced by the Worldwide harmonized Light vehicles Test Procedure (WLTP).[37]

Heavy duty vehicles

[edit]

The two groups of emissions standards for heavy duty vehicles each have different appropriate test requirements. Steady-state testing is used for diesel engines only, while transient testing applies to both diesel and petrol engines.[38]

"Cycle beating" controversy

[edit]
Comparison between emission standards for nitrogen oxides (NOx) of diesel cars and measured emissions[39]

For the emission standards to deliver actual emission reductions, it is crucial to use a test cycle that reflects real-world driving conditions. It was discovered[40] that vehicle manufacturers would optimise emissions performance only for the test cycle, whilst emissions from typical driving conditions proved to be much higher than when tested. Some manufacturers were also found to use so-called defeat devices where the engine control system would recognise that the vehicle was being tested, and would automatically switch to a mode optimised for emissions performance. The use of a defeat device is expressly forbidden in EU law.[28]

An independent study in 2014 used portable emissions measurement systems to measure NOx emissions during real world driving from fifteen Euro 6 compliant diesel passenger cars. The results showed that NOx emissions were on average about seven times higher than the Euro 6 limit. However, some of the vehicles did show reduced emissions, suggesting that real world NOx emission control is possible.[41] In one particular instance, research in diesel car emissions by two German technology institutes found that zero "real" NOx reductions in public health risk had been achieved despite 13 years of stricter standards (2006 report).[42]

In 2015, the Volkswagen emissions scandal involved revelations that Volkswagen AG had deliberately falsified emission reports by programming engine management unit firmware to detect test conditions, and change emissions controls when under test. The cars thus passed the test, but in real world conditions, emitted up to forty times more NOx emissions than allowed by law.[43] An independent report in September 2015 warned that this extended to "every major car manufacturer",[44] with BMW, and Opel named alongside Volkswagen and its sister company Audi as "the worst culprits",[44] and that approximately 90% of diesel cars "breach emissions regulations".[44] Overlooking the direct responsibility of the companies involved, the authors blamed the violations on a number of factors, including "unrealistic test conditions, a lack of transparency and a number of loopholes in testing protocols".[44]

Real Driving Emissions (RDE)

In 2017, the European Union introduced testing in real-world conditions called Real Driving Emissions (RDE), using portable emissions measurement systems in addition to laboratory tests.[45] The actual limits will use 110% (CF=2.1) "conformity factor" (the difference between the laboratory test and real-world conditions) in 2017, and 50% (CF=1.5) in 2021 for NOx,[46] conformity factor for particles number P being left for further study. Environment organisations criticized the decision as insufficient,[47][48] while ACEA mentions it will be extremely difficult for automobile manufacturers to reach such a limit in such short period of time.[49] In 2015, an ADAC study (ordered by ICCT) of 32 Euro 6 cars showed that few complied with on-road emission limits, and LNT/NOx adsorber cars (with about half the market) had the highest emissions.[50] At the end of this study, ICCT was expecting a 100% conformity factor.[51]

NEDC Euro 6b not to exceed limit of 80 mg/km NOx will then continue to apply for the WLTC Euro 6c tests performed on a dynomometer while WLTC-RDE will be performed in the middle of the traffic with a PEMS attached at the rear of the car. RDE testing is then far more difficult than the dynomometer tests. RDE not to exceed limits have then been updated to take into account different test conditions such as PEMS weight (305–533 kg in various ICCT testing[52]), driving in the middle of the traffic, road gradient, etc.

ADAC also performed NOx emission tests with a cycle representative of the real driving environment in the laboratory.[53][54] Among the 69 cars tested:

  • 17 cars emit less than 80 mg/km, i.e. do not emit more NOx on this more demanding cycle than on the NEDC cycle.
  • 22 additional cars fall below the 110% conformity factor. In total: 57% of cars have then a good chance to be compatible with WLTC-RDE.
  • 30 cars fall above the 110% conformity factor and have then to be improved to satisfy the WLTC-RDE test.

Since 2012, ADAC performs regular pollutant emission tests[55][56] on a specific cycle in the laboratory duly representing a real driving environment and gives a global notation independent from the type of engine used (petrol, diesel, natural gas, LPG, hybrid, etc.). To get the maximum 50/50 note on this cycle, the car shall emit less than the minimum limit applicable to either petrol or diesel car, that is to say 100 mg HC, 500 mg CO, 60 mg NOx, 3 mg PM and 6×1010 PN. Unlike ambient discourse dirty diesel versus clean petrol cars, the results are much more nuanced and subtle. Some Euro 6 diesel cars perform as well as the best hybrid petrol cars; some other recent Euro 6 petrol indirect injection cars perform as the worst Euro 5 diesel cars; finally some petrol hybrid cars are at the same level as the best Euro 5 diesel cars.[57][58]

Tests commissioned by Which? from the beginning of 2017 found that 47 out of 61 diesel car models exceed the Euro 6 limit for NOx, although they conform to official standards.[59]

Health impacts

[edit]

After the postponement in publishing the Euro 7 proposal details by the European Commission, some civil society groups (such as the European Respiratory Society and the European Public Health Alliance) said in mid-2022: "Every month that the implementation of Euro 7 is delayed due to the late publication of the proposal, 1 million more polluting cars will be placed on the EU's road and stay there for decades to come."[60]

CO2 emissions

[edit]
See also: Climate change in Europe § Transport

Within the European Union, transport is the biggest emitter of CO2,[61] with road transport contributing about 20%.[62]

Obligatory labelling

[edit]

The purpose of Directive 1999/94/EC of the European Parliament and the Council of 13 December 1999 relating to the availability of consumer information on fuel economy and CO2 emissions in respect of the marketing of new passenger cars[63] is to ensure that information relating to the fuel economy and CO2 emissions of new passenger cars offered for sale or lease in the Community is made available to consumers in order to enable consumers to make an informed choice.

In the United Kingdom, the initial approach was deemed ineffective. The way the information was presented was too complicated for consumers to understand. As a result, car manufacturers in the United Kingdom voluntarily agreed to put a more "consumer-friendly", colour-coded label displaying CO2 emissions on all new cars beginning in September 2005, with a letter from A (<100 CO2 g/km) to F (186+ CO2 g/km). The goal of the new "green label" is to give consumers clear information about the environmental performance of different vehicles.[64]

Other EU member countries are also in the process of introducing consumer-friendly labels.

Obligatory vehicle CO2 emission limits

[edit]

European Union Directive No 443/2009 set a mandatory average fleet CO2 emissions target for new cars, after a voluntary commitment made in 1998 and 1999 by the auto industry had failed to reduce emissions by 2007. The regulation applies to new passenger cars registered in the European Union and EEA member states for the first time. A carmaker who fails to comply has to pay an "excess emissions premium" for each vehicle registered according with the amount of g/km of exceeded.[65]

EU targets from 2015 to 2030 and historical trend of annual average new fleet CO2 emissions in Norway (2011–2019).
Source: Norwegian Road Federation (OFV)

The 2009 regulation set a 2015 target of 130 g/km for the fleet average for new passenger cars. A similar set of regulations for light commercial vehicles was set in 2011, with an emissions target of 175 g/km for 2017. Both targets were met several years in advance. A second set of regulations, passed in 2014, set a 2021 target of average CO2 emissions of new cars to fall to 95 g/km by 2021, and for light-commercial vehicles to 147 g/km by 2020.[66][67]

In April 2019, Regulation (EU) 2019/631 was adopted, which introduced CO2 emission performance standards for new passenger cars and new light commercial vehicles for 2025 and 2030. The new Regulation went into force on 1 January 2020, and has replaced and repealed Regulation (EC) 443/2009 and (EU) No 510/2011.[66][68] The 2019 Regulation set new emission targets relative to a 2021 baseline, with a reduction of the average CO2 emissions from new cars by 15% in 2025, and by 37.5% in 2030. For light-commercial vehicles the new targets are a 15% reduction for 2025 and a 31% reduction for 2030.[67][69]

Specific emissions targets for passenger cars

To account for different sizes of passenger cars, the specific emissions target for each passenger car is calculated by adjusting the general emissions target by a value proportional to the deviation of the car's mass from the average. This means that the emissions targets for heavier cars are higher than those for lighter cars. In Regulations (EC) 443/2009 and (EU) 2019/631 this relationship between the specific emissions target E and the general emissions target E0 is expressed as E = E0 + a × (M-M0) with the mass of the specific vehicle denoted by M and the average vehicle mass denoted by M0 (approx. 1,400 kg (3,100 lb)). The Regulations determine the factor a as 0.0457 for 2012–2019 and as 0.0333 from 2020 onward.[65][68]

Pooling

Two or more car manufacturers may form a pool which allows them to meet fleet targets as a group instead of having to meet them individually. The first pool was agreed among Tesla and Fiat Chrysler in 2019, reportedly costing Fiat Chrysler hundreds of millions of Euros.[70]

ZLEV Credit System

The 2019 Regulation also introduced an incentive mechanism or credit system from 2025 onwards for zero- and low-emission vehicles (ZLEVs). A ZLEV is defined as a passenger car or a commercial van with CO2 emissions between 0 and 50 g/km. The regulation set ZLEV sales targets of 15% for 2025 and 35% for 2030, and manufacturers have some flexibility in how they achieve those targets. Carmakers that outperform the ZLEV sales targets will be rewarded with higher CO2 emission targets, but the target relaxation is capped at a maximum 5% to safeguard the integrity of the regulation.[67][69]

Electrification

[edit]

Many EU member states have responded to this problem by exploring the possibility of including electric vehicle-related infrastructure into their existing road traffic system, with some even having begun implementation. The UK has begun its "plugged-in-places" scheme which sees funding go to several areas across the UK to create a network of charging points for electric vehicles.[71]

Around the world

[edit]
  • Since 1 January 2012, all new heavy vehicles in Brazil must comply with Proconve P7 (similar to Euro 5)[72]
  • Since September 2014, all new cars in Chile must comply with Euro 5.[73]
  • Since 1 January 2015, all new light vehicles in Brazil must comply with Proconve L6 (similar to Euro 5).[74]
  • Since 1 January 2016, all new heavy vehicles in Argentina must comply with Euro 5.[75]
  • Since January 2016, all new light vehicles in Russia must comply with Euro 5.[76]
  • Since 2016, all new vehicles in Turkey must comply with Euro 6.[77][78]
  • Since 1 September 2017, all new petrol vehicles in Singapore must comply with Euro 6 with new diesel vehicles following suit from 1 January 2018.[79][80]
  • Since 1 January 2018, all new vehicles in the Philippines must comply with Euro 4.
  • Since 1 January 2018, all new vehicles in China must comply with China 5 (similar to Euro 5).[81]
  • Since 1 January 2018, all new light and heavy vehicles in Argentina must comply with Euro 5.[82]
  • Since 2018, all new heavy vehicles in Russia must comply with Euro 5.[76]
  • Since 1 April 2018, Euro 4, Tier 2, and EPA 2007 are mandated in Peru.[83]
  • Since 8 October 2018, all new petrol cars in Indonesia must comply with Euro 4.[84]
  • Since 1 July 2019, all new heavy vehicles in Mexico must comply with EPA 07 and Euro 5.[85]
  • Since 1 April 2020, all new 2, 3 or 4-wheelers in India must comply with BS VI (similar to Euro 6)[86]
  • Since 1 January 2021, all new vehicles in ECOWAS must comply with Euro 4.[87]
  • Since 1 January 2021, all new vehicles in China must comply with China 6a (similar to Euro 6).[88]
  • Since 1 January 2022, all new vehicles in Cambodia must comply with Euro 4.[89]
  • Since 1 January 2022, all new cars in Vietnam must comply with Euro 5.[90]
  • Since 1 January 2022, all new light vehicles in Brazil must comply with Proconve L7 (similar to Euro 6).[91]
  • Since September 2022, all new light and medium vehicle models in Chile must comply with Euro 6b.[92]
  • Since 12 April 2022, all new diesel vehicles in Indonesia must comply with Euro 4.[93]
  • Since 1 January 2023, all new heavy vehicles in Brazil must comply with Proconve P8 (similar to Euro 6).[94]
  • Since 1 January 2023, all new vehicles in Colombia must comply with Euro 6b.[95][96]
  • Since 1 July 2023, all new vehicles in China must comply with China 6b (more strict than provisional so-called "Euro 7").[88]
  • Since 1 January 2024, all new vehicles in Thailand must comply with Euro 5.[97]
  • Since 1 January 2024, all new vehicles in Morocco must comply with Euro 6b.[98]
  • Since 1 October 2024, Euro 6b, Tier 3, and EPA 2010 are mandated in Peru for new vehicles.[99]
  • Since 1 January 2025, all new heavy vehicles in Mexico must comply with EPA 10 and Euro 6.[85]
  • Since 1 January 2025, the new light vehicle fleets in Brazil must comply with the first stage of Proconve L8 (automaker average).[100]
  • From 30 September 2025, all new light and medium vehicle models in Chile must comply with Euro 6c.[101]
  • From December 2025, all new vehicles sold in Australia must comply with Euro 6d.[102]
  • From 1 January 2027, all new vehicles in Cambodia must comply with Euro 5.[89]

Bans

[edit]

Full-time car bans

[edit]
  • Euro 0 petrol or diesel – With exceptions, parts of: Neu-Ulm and 42 other towns of Germany.[103]
  • Euro 1 petrol or diesel – Ghent[104] With exceptions, parts of: Antwerp, Brussels
  • Euro 1 gas[a] – 76 towns of Piedmont[105]
  • Euro 2 diesel – Parts of: Neu-Ulm[103]
  • Euro 2 petrol or diesel – 76 towns of Piedmont[105]
  • Euro 2 – Madrid (nonlocal)[106] With exceptions, parts of: Torrejón de Ardoz and Zaragoza.[107][108]
  • Euro 3 diesel – Amsterdam, Arnhem, The Hague, Utrecht, Madrid (nonlocal), and parts of 42 towns of Germany.[104][106][103] With exceptions, parts of: Grand Lyon, Aix-Marseille-Provence Metropolis, Rouen, Strasbourg, Toulouse, Torrejón de Ardoz and Zaragoza.[109][107][108] With exceptions and free public transport, parts of: Montpellier Méditerranée Métropole[110][111][112]
  • Euro 3 petrol or diesel – With exceptions, retrofit funding, and replacement-neutral scrappage, parts of: Glasgow[113][114][115]
  • Euro 3 petrol - Since 1 October 2024, in Milan's inner ZTL (Area C), all petrol-engine passenger cars are required to be Euro 4 or a higher class.[116]
  • Euro 4 diesel – Ghent, Munich, and Stuttgart.[104][117] With exceptions, parts of: Antwerp, Brussels, Madrid[118]
  • Euro 4 petrol - Since 1 October 2027, in Milan's inner ZTL (Area C), all petrol-engine passenger cars are required to be Euro 5 or a higher class.[116]
  • Euro 5 diesel – Darmstadt and parts of Stuttgart[117] With exceptions, parts of: Aalborg, Aarhus, Copenhagen, Frederiksberg, and Odense[119] With exceptions, retrofit funding, and replacement-neutral scrappage, parts of: Glasgow[113][114][115]
  • Euro 5 petrol - Since 1 October 2030, in Milan's inner ZTL (Area C), all petrol-engine passenger cars are required to be Euro 6 or a higher class.[116]
  • Euro 6 non-gas[b] or non-electrified[c] – With exceptions, center of: Madrid[120][121]
  • Since 2019, some German cities ban Euro 4 or 5 diesel cars.[122]
  • Since 1 September 2022, Euro 3 diesel cars are banned in Rouen and Toulouse (with exceptions).[109]
  • Since 1 June 2023, Euro 3 (petrol or diesel) cars and Euro 5 diesel cars are banned (with exceptions, retrofit funding, and replacement-neutral scrappage) in parts of: Glasgow.[113][114][115]
  • Since September 2023, Euro 3 diesel cars are banned in parts of Aix-Marseille-Provence Metropolis (with exceptions).[109]
  • Since 1 October 2023, Euro 5 diesel cars are banned (with exceptions) in parts of: Aalborg, Aarhus, Copenhagen, Frederiksberg, and Odense.[119]
  • Since 1 January 2024, Euro 2 cars and Euro 3 diesel cars are banned (with exceptions) in parts of: Torrejón de Ardoz and Zaragoza[107][108]
  • Since 1 January 2024, Euro 3 diesel cars are banned in Grand Lyon (with exceptions) and parts of Strasbourg.[109] With exceptions and free public transport, in parts of: Montpellier Méditerranée Métropole.[110][111][112]
  • Since 1 January 2024, Euro 6 non-gas[b] or non-electrified[c] cars are banned (with exceptions) in the center of: Madrid[120][121]
  • Since 30 May 2024, Euro 3 (petrol or diesel) cars and Euro 5 diesel cars are banned (with exceptions, retrofit funding, and replacement-neutral scrappage) in parts of: Dundee.[114][115]
  • Since 1 June 2024, Euro 3 (petrol or diesel) cars and Euro 5 diesel cars are banned (with exceptions, retrofit funding, and replacement-neutral scrappage) in parts of: Aberdeen and Edinburgh.[114][115]
  • Since 1 January 2025, Euro 1 cars will be banned in Nantes.[123]
  • Since 1 January 2025, Euro 2 cars and Euro 3 diesel cars will be banned in Madrid (with exceptions).[106]
  • Since 1 January 2025, Euro 3 (petrol or diesel) cars and Euro 4 diesel cars will be banned in parts of Montpellier Méditerranée Métropole (with exceptions and free public transport) and Grand Paris.[111][112][124]
  • From 1 April 2025, Euro 2 cars and Euro 3 diesel cars will be banned in Granada (nonlocal).[125]
  • From 1 January 2028, Euro 4 (petrol or diesel) cars and Euro 6 diesel cars will be banned in parts of: Grand Lyon.[126]

Notes

[edit]
  1. ^ Gas here refers to natural gas or LPG
  2. ^ a b Gas here refers to natural gas, LPG, or HICEV. It is not guaranteed that bi-fuel vehicles will be running on gas.
  3. ^ a b Electrified here includes mild hybrids, even if many pollute more than some banned cars. Also, a PHEV with a depleted battery is worse than a full hybrid or series hybrid version.

See also

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

European emission standards

View on Grokipedia
from Grokipedia
European emission standards, known as norms, comprise a sequence of directives imposing mandatory limits on pollutant emissions from the exhaust of new road vehicles sold across member states and countries. These regulations target key harmful substances including , unburnt hydrocarbons, nitrogen oxides, and particulate matter, with separate thresholds for light-duty (passenger cars and vans) and heavy-duty (trucks and buses) vehicles. Initiated with Euro 1 for light-duty vehicles in 1992, the standards have evolved through successive stages, each introducing tighter limits roughly every four to five years to curb urban from . For instance, diesel NOx limits for light-duty vehicles dropped from 1,000 mg/km under Euro 3 (2000) to 80 mg/km under Euro 6 (2014), driving adoption of technologies like and diesel particulate filters. Euro 6 remains the current primary standard as of 2025, supplemented by real driving emissions (RDE) testing introduced post-2017 to address discrepancies between laboratory cycles and on-road performance. Euro 7, adopted by the EU Council in April 2024, maintains core Euro 6 exhaust limits for and while imposing novel controls on non-tailpipe emissions from and tires, alongside extended durability requirements; phased implementation begins in mid-2025 for light-duty and 2027 for heavy-duty vehicles. Achievements include empirical reductions exceeding 90% in fleet-average emissions for regulated pollutants since the early , correlating with improved air quality metrics in EU cities. However, controversies persist, notably the 2015 "Dieselgate" revelations where manufacturers like deployed software defeat devices to evade limits in real-world conditions, exposing systemic flaws in pre-RDE validation methods and prompting regulatory overhauls despite lab compliance. Real-world monitoring data indicates persistent exceedances for diesels even under Euro 6, underscoring challenges in achieving parity between certified and actual emissions.

Historical Development

Origins and Early Implementation (Euro 1 to Euro 3)

The European emission standards for motor vehicles emerged in response to rising concerns over urban from exhaust gases, prompting the (EEC) to harmonize member states' regulations. The foundational framework was established by Council Directive 70/220/EEC of 20 March 1970, which focused on approximating laws relating to measures against by emissions from positive-ignition (petrol) engines in passenger cars and light commercial vehicles, setting initial limits for (CO) and hydrocarbons (HC) tested under steady-state conditions. This directive, later amended extensively, laid the groundwork for type-approval procedures but imposed relatively lenient limits compared to contemporaneous U.S. standards, reflecting Europe's slower initial regulatory response to vehicle emissions amid priorities for and . Separate provisions for diesel engines followed with Directive 72/306/EEC in 1972, targeting particulate matter (PM), though enforcement emphasized lab-based testing over real-world performance. The "Euro" nomenclature began with Euro 1 standards in 1992, marking the first binding EU-wide limits for both petrol and diesel light-duty vehicles (passenger under 2.5 tonnes and light trucks), implemented via Directive 91/441/EEC for and 93/59/EEC for light commercials. These applied to CO, HC, nitrogen oxides (), and PM (diesel only), measured over the ECE urban driving cycle plus extra-urban EUDC, with limits in g/km. Euro 1 required type approval from July 1992 for new models, extending to all new vehicles by early 1993, but allowed higher tolerances for cold-start emissions and did not mandate catalytic converters universally, limiting effectiveness against NOx from diesels.
PollutantPetrol (Positive Ignition)Diesel
CO (g/km)2.722.72
HC (g/km)--
HC+NOx (g/km)0.97-
NOx (g/km)--
PM (g/km)-0.14
For heavy-duty vehicles (trucks and buses), parallel Euro I standards under Directive 88/77/EEC took effect in 1992, applying steady-state engine testing in g/kWh and introducing PM limits differentiated by power output, though without transient cycle requirements that would better simulate real operation. These early standards prioritized convergence over stringent cuts, with diesel NOx tolerances remaining high due to technological challenges in exhaust aftertreatment. Euro 2 standards, enacted through Directives 94/12/EC and 96/69/EC, tightened limits effective January 1996 for type approval and 1997 for all light-duty vehicles, distinguishing indirect (IDI) from direct-injection (DI) diesels and mandating closed-loop fuel control for petrol engines to reduce HC. PM limits halved for diesels, but reductions were modest, reflecting reliance on engine redesigns rather than advanced catalysts, tested still on ECE+EUDC.
PollutantPetrolDiesel (IDI)Diesel (DI)
CO (g/km)2.21.01.0
HC (g/km)0.5--
HC+NOx (g/km)---
NOx (g/km)---
PM (g/km)-0.080.10
Heavy-duty Euro II, from October 1996 for new types and 1998 for all, further reduced PM via amendments to 88/77/EEC, maintaining steady-state testing and high NOx allowances that contributed to persistent urban smog issues. Euro 3, under Directive 98/69/EC, advanced implementation from January 2000 for type approval and 2001 for all light-duty vehicles, introducing separate HC and reporting for diesels, a 50% PM cut, and transition to the New European (NEDC) for more representative urban simulation, alongside sulfur reductions in fuel to enable better catalyst performance. Diesels still faced looser CO but tighter particulates, underscoring causal trade-offs in combustion control versus aftertreatment.
PollutantPetrolDiesel
CO (g/km)2.30.64
HC (g/km)0.2-
HC+NOx (g/km)-0.56
(g/km)-0.50
PM (g/km)-0.050
For heavy-duty, Euro III from October 1999/2000 introduced optional transient (ETC) and enhanced steady-state (ESC/ELR) cycles per Directive 1999/96/EC, halving NOx and PM versus Euro II, with voluntary Enhanced Environmentally friendly Vehicle (EEV) sub-limits for advanced tech, though adoption lagged due to cost. Early phases thus achieved incremental pollutant reductions—primarily CO and PM—via improved and basic oxidation catalysts, but NOx control remained inadequate, as lab tests overestimated compliance amid real-world discrepancies.

Evolution to Euro 4 through Euro 6

Euro 4 standards, introduced via Directive 2005/55/EC for heavy-duty engines and amendments to Directive 70/220/EEC for light-duty vehicles, took effect for new light-duty vehicle types in January 2005 and all new registrations by January 2006, while heavy-duty Euro IV applied from October 2005 for engines and January 2006 for vehicles. These standards halved limits for diesel light-duty passenger cars to 0.25 g/km from Euro 3 levels and reduced particulate matter (PM) to 0.025 g/km, with CO limited to 0.5 g/km; for petrol vehicles, CO was capped at 1.0 g/km and combined HC+NOx at 0.08 g/km. Heavy-duty Euro IV set at 3.5 g/kWh and PM at 0.02 g/kWh, reflecting advances in exhaust aftertreatment like diesel particulate filters (DPFs) becoming more widespread, though real-world emissions often exceeded lab-tested limits due to test cycle limitations. Euro 5 standards, established under Regulation (EC) No 715/2007, applied to new light-duty types from September 2009 and all vehicles from January 2011, introducing fuel-neutral PM limits for direct-injection petrol engines and further tightening diesel to 0.18 g/km and PM to 0.005 g/km while maintaining CO at 0.5 g/km. For heavy-duty vehicles, Euro V from Directive 2005/55/EC (effective September 2008 for new engines, January 2009 for vehicles) reduced to 2.0 g/kWh but kept PM at 0.02 g/kWh, emphasizing (SCR) systems for control amid growing evidence of urban air quality issues from incomplete particulates. These changes aimed to address ultrafine particles but relied on the NEDC test cycle, which underestimated real-driving emissions by factors of 4-7 for diesels, as later revealed by on-road testing. Euro 6 standards, also under Regulation (EC) No 715/2007 as amended, mandated compliance for new light-duty types from September 2014 and all registrations by September 2015, slashing diesel to 0.08 g/km, PM to 0.0045 g/km, and introducing a particle number (PN) limit of 6 × 10¹¹ particles/km to target nanoparticles evading mass-based PM filters. Petrol direct-injection engines faced the same PN threshold, with CO steady at 0.5 g/km and HC+ at 0.17 g/km. For heavy-duty, Euro VI via Regulation (EC) No 595/2009 applied from December 2013 for new engines and September 2014 for vehicles, imposing at 0.4 g/kWh, PM at 0.01 g/kWh, and PN limits, alongside in-service requirements to verify . Subsequent 2016-2017 amendments added Real Driving Emissions (RDE) testing using portable emissions measurement systems (PEMS) with factors (initially 2.1 for , tightened to 1.43 by 2021), addressing the gap between lab and road outputs where Euro 5/6 diesels often emitted 5-10 times lab limits without advanced urea-SCR.
PollutantEuro 4 Diesel (g/km)Euro 5 Diesel (g/km)Euro 6 Diesel (g/km)
CO0.500.500.50
0.250.180.08
PM0.0250.0050.0045
PN (particles/km)--6 × 10¹¹
This progression prioritized and PM reductions driven by health impacts from respiratory and cardiovascular effects of traffic-related pollution, though enforcement challenges and cycle-beating strategies delayed full real-world benefits until RDE implementation.

Introduction of Euro 7 and Future Iterations

The Euro 7 emission standards, formally established under Regulation (EU) 2024/1257 adopted by the and on April 24, 2024, represent the most recent advancement in the European Union's framework for controlling pollutant emissions from road vehicles. For the first time, the regulation unifies requirements for both light-duty vehicles (such as passenger cars and vans) and heavy-duty vehicles (including trucks and buses), extending beyond tailpipe emissions to include non-exhaust sources like and particles, as well as cold-start emissions and battery durability for electrified vehicles. Implementation is phased: for light-duty categories (M1 and ), new vehicle types must comply starting November 29, 2026, with all new registrations following by 2027; heavy-duty categories (, M3, N2, N3) face later deadlines, with new types required from 2027 and full applicability by 2028-2029. These standards build on Euro 6 by imposing stricter limits—for instance, reducing nitrogen oxides () for light-duty diesels to 60 mg/km from 80 mg/km under certain conditions—while introducing real-world testing expansions and requirements up to 10 years or 124,000 miles for critical components. The development of Euro 7 encountered significant delays and compromises amid industry opposition, particularly from the (ACEA), which argued that the original 2025 proposal would impose excessive costs—estimated at €5-15 billion annually—for marginal air quality gains, especially given the rising share of electric vehicles exempt from many tailpipe rules. Initially proposed by the in November 2022 with a mid-2025 rollout for light-duty vehicles, the timeline was pushed back following trilogue negotiations, reflecting tensions between environmental advocates pushing for aggressive pollutant cuts (projecting up to 7,200 fewer premature deaths by 2050) and manufacturers citing technological and economic feasibility challenges. The final regulation moderates some ambitions, such as relaxing particle number limits for engines and providing flexibility for small-volume producers, but retains innovative elements like mandatory on-board monitoring systems to ensure long-term compliance. Looking to future iterations, no formal 8 standards have been proposed as of 2025, with 7 positioned as a transitional framework bridging current regulations and the EU's broader decarbonization mandates. Policymakers anticipate that subsequent pollutant controls will integrate with fleet-wide CO2 , which require zero grams per kilometer for new light-duty from 2035, effectively phasing out new sales and diminishing the relevance of tailpipe emission tiers. Discussions in technical forums emphasize adapting standards for , such as engines or advanced hybrids, but causal analyses suggest that air quality improvements will increasingly derive from vehicle and turnover rather than iterative tightening of Euro-series limits, given non-exhaust emissions' growing dominance in urban profiles. Any post- 7 revisions would likely prioritize of existing rules over new pollutant thresholds, pending evaluations of 7's real-world efficacy through expanded and data.

Regulatory Framework

The legal basis for European emission standards derives from EU legislation harmonizing type-approval requirements to ensure the free movement of vehicles while limiting pollutants, primarily under Article 114 of the Treaty on the Functioning of the (TFEU), which empowers the adoption of measures for the internal market. For light-duty vehicles, the foundational framework was established by Directive 70/220/EEC of 20 March 1970, which introduced initial exhaust emission limits and has been amended repeatedly to incorporate successive standards up to 4. Subsequent regulations, such as Regulation (EC) No 715/2007, codified 5 and 6 limits for passenger cars and light commercial vehicles, mandating compliance for new type-approvals from September 2009 and September 2014, respectively. The 7 standards, adopted on 24 April 2024 via Regulation (EU) 2024/1257, unify pollutant limits for both light- and heavy-duty vehicles, engines, and non-exhaust emissions (e.g., from brakes and tires), with applicability starting in 2027 for cars and vans and 2028 for trucks and buses. For heavy-duty vehicles, earlier standards relied on directives like 88/77/EEC (amended for I to IV) and Regulation (EC) No 595/2009 for VI, now consolidated under the Euro 7 framework. Enforcement operates through a type-approval system governed by Regulation (EU) 2018/858, which designates national type-approval authorities in member states to certify compliance via accredited technical services conducting lab and real-driving emissions (RDE) tests. Manufacturers must demonstrate conformity of production through statistical sampling and periodic audits, while in-service conformity checks—introduced for Euro 6 via on-road testing—require vehicles to meet limits over their useful life, with particle number and thresholds enforced via portable emissions measurement systems (PEMS). Non-compliance triggers remedial actions, including software updates or recalls, overseen by national market surveillance authorities empowered to seize vehicles, impose fines (up to €30,000 per non-compliant vehicle under some national implementations), and revoke approvals. The enforces supranational oversight by monitoring member state implementation, initiating infringement proceedings under Article 258 TFEU for systemic failures, and coordinating EU-wide recalls, as seen in the Dieselgate scandal where fines exceeded €30 billion across manufacturers. Recent enhancements under Euro 7 include extended durability requirements (up to 10 years or 124,000 km for light-duty) and mandatory reporting to bolster traceability and deterrence.

Vehicle Categories and Applicability

European emission standards regulate exhaust emissions from new motor vehicles placed on the market in the and member states, with applicability determined by vehicle categories defined under the EU type-approval framework in Regulation (EU) 2018/858, which incorporates UNECE classifications. These categories distinguish between passenger-carrying vehicles (M) and goods-carrying vehicles (N), with subcategories based on , maximum , and intended use. Standards do not apply retroactively to existing vehicles but mandate compliance for type approvals and first registrations of new vehicles and engines. The primary categories are outlined as follows:
CategoryDefinition
M1Vehicles for carriage of passengers comprising no more than eight seats in addition to the driver's seat and a maximum design not exceeding 3.5 tonnes.
M2Vehicles for carriage of passengers with more than eight seats in addition to the driver's seat and a maximum not exceeding 5 tonnes.
M3Vehicles for carriage of passengers with more than eight seats in addition to the driver's seat and a maximum exceeding 5 tonnes.
N1 for carriage of goods with a maximum not exceeding 3.5 tonnes.
N2 for carriage of goods with a maximum exceeding 3.5 tonnes but not exceeding 12 tonnes.
N3 for carriage of goods with a maximum exceeding 12 tonnes.
Light-duty emission standards, covering Euro 1 through Euro 7, primarily apply to M1 and vehicles, as well as M2 and N2 vehicles with a reference not exceeding 2,610 kg (extendable to 2,840 kg under certain conditions for manufacturer requests). These standards, governed by (EC) No 715/2007 and its successors, target passenger cars and light commercial vehicles using both diesel (compression ignition) and or (positive ignition) engines, with specific particle limits for direct-injection positive ignition engines from Euro 5 onward. Heavy-duty standards, such as Euro VI and the forthcoming Euro VII, apply to M2 and N2 vehicles exceeding 2,610 kg reference , as well as all M3 and N3 vehicles, focusing on larger buses, trucks, and engines with a technically permissible maximum laden over 3.5 tonnes. Euro VII introduces unified limits across categories but differentiates measurement units (mg/km for M1/N1; mg/kWh for others) and allows light-duty procedures for certain N2 vehicles between 3.5 and 5 tonnes. Separate standards exist for two- and three-wheeled vehicles (L-category, including motorcycles and mopeds), with Euro 5 applicable to new type approvals from 2020 and all new registrations from 2021, emphasizing conventional pollutant limits like CO, HC, and . Non-road mobile machinery and tractors fall under distinct Stage V standards rather than Euro norms for road vehicles. Exemptions may apply to specialized vehicles for social needs or small-volume production, but these are phased out in later standards like Euro 6 and 7. Compliance is verified through type-approval testing, ensuring standards align with real-world driving conditions via protocols like WLTP and RDE.

Compliance Testing and Certification Processes

The compliance testing and certification processes for European emission standards are governed by the type-approval framework, under which national type-approval authorities certify that vehicle types, engines, or systems meet specified pollutant limits before placement on the market. This involves submitting prototypes for testing to verify adherence to standards such as Euro 6 or Euro 7, with approvals valid EU-wide through Whole Vehicle Type Approval for complete vehicles. Manufacturers must demonstrate compliance via standardized laboratory and on-road tests, ensuring emission control systems function as designed, including durability requirements over the vehicle's useful life. For light-duty vehicles, including passenger cars (category M1) and light commercial vehicles (N1, N2 up to 2,610 kg), certification requires chassis dynamometer testing under the Worldwide Harmonised Light Vehicles Test Procedure (WLTP), which simulates driving cycles and measures emissions like CO, NOx, PM, and PN in g/km or #/km. Introduced via Regulation (EU) 2017/1151 and amended by (EU) 2018/1832, WLTP replaced the New European Driving Cycle (NEDC) for new types from September 2017 and all registrations by September 2018. Complementing WLTP, Real Driving Emissions (RDE) testing uses Portable Emissions Measurement Systems (PEMS) for on-road validation, covering urban, rural, and motorway segments over 90-120 minutes, with conformity factors (e.g., 1.43 for NOx under Euro 6d) allowing limited exceedance of lab limits to account for variability. In-service conformity (ISC) programs, including type-approval RDE and post-market surveillance via type 4 and 6 tests, ensure continued compliance after vehicles accumulate mileage. Heavy-duty vehicles, such as trucks (N3) and buses (M3), undergo engine-focused under Euro VI, testing on engine dynamometers with the World Harmonised Transient Cycle (WHTC) for transient operation and World Harmonised Stationary Cycle (WHSC) for steady-state, yielding results in g/kWh. Regulation (EC) No 595/2009 establishes these rules, with implementing measures in (EU) No 582/2011 requiring , off-cycle emission checks, and PEMS-based on-road testing during type-approval. In-service conformity mandates PEMS field tests on vehicles after at least 25,000 km, where the 90th percentile of results must not exceed 1.5 times WHTC limits for gaseous pollutants under Euro VI-E, tightening to 1.0 under proposed Euro VII from 2027/2028. Conformity of production audits and durability demonstrations for pollution-control devices, such as systems, are integral to maintaining . These processes address historical gaps between laboratory and real-world emissions, as evidenced by scandals like Volkswagen's defeat devices, by incorporating RDE and ISC to enforce causal accountability for in-use performance, though conformity factors have been criticized for permitting some real-world exceedances.

Pollutant Emission Limits

Standards for Passenger Cars and Light-Duty Vehicles

European emission standards for passenger cars (category M1, vehicles with no more than eight seats and a maximum not exceeding 3.5 tonnes) and light-duty vehicles (primarily category , goods vehicles with maximum ≤3.5 tonnes) regulate tailpipe emissions of carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (), particulate matter (PM), and, from Euro 5 onward, particle number (PN). These limits, expressed in grams per kilometer (g/km), have tightened progressively across Euro stages, with separate thresholds for diesel (compression ignition) and petrol (positive ignition) engines to address differing combustion characteristics and pollutant profiles—diesel engines historically emitting higher NOx and PM, while petrol engines produce more CO and HC. Implementation dates refer to new type approvals, followed by all new vehicles 12-24 months later. Standards for N1 vehicles align closely with M1 but include reference mass-based classes (I, II, III), with Class I matching M1 limits and higher classes permitting elevated thresholds (e.g., up to 20% higher NOx for Class III under Euro 6). For diesel passenger cars, Euro 1 (July 1992) set initial limits of 2.72 g/km CO, 0.97 g/km , and 0.14 g/km PM, evolving to Euro 6 (September 2014) with 0.5 g/km CO, 0.17 g/km , 0.08 g/km , 0.005 g/km PM, and 6.0 × 10¹¹ particles/km (PN >23 nm). PM and PN apply to direct-injection engines, reflecting diesel's challenges. Euro 2 distinguished indirect (IDI) and direct injection (DI), with DI facing stricter PM (0.10 g/km vs. 0.08 g/km). Subsequent stages separated HC and , reducing by over 90% from Euro 1 levels through technologies like .
StageDate (TA)CO (g/km)HC+NOx (g/km)NOx (g/km)PM (g/km)PN (/km)
Euro 11992.072.72-0.970.14-
Euro 21996.011.0-0.7-0.90.08-0.10-
Euro 32000.010.640.560.500.050-
Euro 42005.010.500.300.250.025-
Euro 52009.090.500.230.180.005(5b: 6×10¹¹)
Euro 62014.090.500.170.080.0056×10¹¹
Petrol engines saw Euro 1 limits of 2.72 g/km CO (with HC and measured but not strictly limited initially), tightening to Euro 6's 1.0 g/km CO, 0.10 g/km total HC (THC), 0.068 g/km non-methane HC (NMHC), 0.060 g/km , 0.005 g/km PM (for direct injection), and 6.0 × 10¹¹ PN. reductions emphasized three-way catalysts, effective under stoichiometric conditions. Euro 7, adopted in 2024 and mandatory for new M1/N1 type approvals from November 2026 (all new vehicles from July 2027), maintains most tailpipe limits but lowers PM to 0.0045 g/km, extends PN to particles >10 nm, and introduces brake and tire particle controls, alongside on-board monitoring for real-world compliance.
StageDate (TA)CO (g/km)HC (g/km)NOx (g/km)PM (g/km)PN (/km)
Euro 11992.072.720.97~1.0--
Euro 21996.012.20.5---
Euro 32000.012.30.20--
Euro 42005.011.00.10--
Euro 5/62009.09/14.091.00.10 (THC)0.005 (DI)6×10¹¹

Standards for Heavy-Duty Vehicles, Trucks, and Buses

European emission standards for heavy-duty vehicles, encompassing trucks, buses, and engines in vehicles exceeding 3.5 tonnes gross , regulate tailpipe emissions from compression-ignition (primarily diesel) and positive-ignition (gas) engines. Limits are expressed in grams per (g/kWh) and apply to testing rather than whole-vehicle certification, targeting pollutants including (CO), total hydrocarbons (THC or HC), nitrogen oxides (), particulate matter (PM), and particle number (PN). These standards originated with Euro I in October 1992 and progressed through Euro II (1996), III (2000), IV (2005), and V (2008), each tightening limits and refining test protocols to address urban air quality degradation from freight and . Euro VI, implemented for new engine types from January 2013 and all vehicles from 2014 under Regulation (EU) No 595/2009 and No 582/2011, marked a significant reduction in from 2.0 g/kWh under Euro V to 0.4 g/kWh, alongside PM limits of 0.01 g/kWh and introduction of PN measurement. Testing shifted to the World Harmonized Stationary Cycle (WHSC) for steady-state operation and World Harmonized Transient Cycle (WHTC) for transient conditions, replacing prior European Steady Cycle (ESC) and European Transient Cycle (ETC). Euro VI also mandated in-service via Portable Emissions Measurement Systems (PEMS) for real-road verification, phased across sub-stages: VI-A (2013), VI-B (2014), VI-C (2015–2016), VI-D (2016–2020 with PEMS factors tightening to 0.7–1.0 times limits), and VI-E (from 2021, adding cold-start testing and PN sub-23 nm). Positive-ignition engines face aligned but slightly differentiated limits, such as at 0.46 g/kWh on WHSC. Emission limits under Euro VI for heavy-duty diesel engines are as follows:
PollutantWHSC Limit (g/kWh)WHTC Limit (g/kWh)
CO1.54.0
HC/THC0.130.16
0.400.40
PM0.010.01
PNN/A6.0 × 10¹¹ #/kWh
For positive-ignition engines, WHSC is 0.46 g/kWh and WHTC 0.33 g/kWh, with PN at 8.0 × 10¹¹ #/kWh on WHSC from later stages. Durability requirements extend to 700,000 km for heavy trucks (N3 category >16 tonnes), ensuring aftertreatment systems like (SCR) for and diesel particulate filters (DPF) for PM maintain efficacy. Despite laboratory compliance, empirical data from PEMS monitoring reveals frequent exceedances of NOx limits in real-world operation, particularly in urban low-speed scenarios where SCR efficiency drops below 70% due to inadequate urea dosing or catalyst degradation; average on-road NOx from Euro VI trucks has been measured at 0.5–1.5 g/kWh, 1.25–3.75 times the standard, undermining projected air quality benefits. This discrepancy arises from cycle-beating optimizations for lab tests and insufficient low-load coverage in early PEMS protocols, as confirmed by independent fleet studies in multiple EU cities. Proposals for Euro VII, agreed in 2024 but pending full implementation beyond 2025, aim to address this with further NOx reductions to 0.2–0.3 g/kWh and expanded non-exhaust emission controls, though critics argue enforcement gaps persist.

Standards for Motorcycles, Non-Road Machinery, and Other Categories

European emission standards for motorcycles and mopeds, classified as L-category vehicles, are governed by Regulation (EU) No 168/2013, as amended to implement Euro 5 requirements. These standards apply to two- and three-wheeled vehicles with engines up to 50 kW, focusing on tailpipe emissions of carbon monoxide (CO), combined hydrocarbons and nitrogen oxides (HC + NOx), and, for Euro 5, particulate matter (PM) for certain subclasses. Euro 5 limits were introduced for new type approvals on 1 January 2020 and extended to all new vehicle sales from 1 January 2021, with CO capped at 1,000–1,140 mg/km depending on vehicle subclass, HC + NOx at 60–80 mg/km, and PM at 4.5 mg/km for applicable direct-injection engines. Compliance is verified through the World Motorcycle Test Cycle (WMTC), a chassis dynamometer procedure simulating urban, rural, and highway driving to address prior criticisms of lab-based testing underestimating real-world emissions. For non-road mobile machinery (NRMM), including construction equipment, agricultural and forestry tractors, and industrial engines, standards are regulated under Regulation (EU) 2016/1628, which establishes phased limits for compression-ignition (diesel) and spark-ignition engines across power ranges from under 19 kW to over 560 kW. Stage V, the most stringent to date, phases in from 1 January 2019 for engines below 56 kW and above 130 kW, and from 1 January 2020 for 56–130 kW engines, targeting reductions in , PM, CO, and HC+. For example, limits range from 0.4 g/kWh for engines under 37 kW to 0.46 g/kWh for larger ones, with PM at 0.015 g/kWh universally; these apply to new type approvals starting in 2018, with full market enforcement by 2020–2021. Stage V extends coverage to previously unregulated small and very large engines, incorporating particle number (PN) limits for engines above 56 kW to curb ultrafine particulates, and requires non-road transient cycles (NRTC) or steady-state cycles for testing heavy-duty engines. Other categories, such as inland waterway vessels and recreational craft, fall under specialized directives rather than the core framework. For inland waterway engines, Stage V-equivalent limits under Directive 2016/1628 apply from 2019–2021, mirroring NRMM and PM thresholds but tailored to propulsion engines over 19 kW. Recreational marine engines, covered by Directive 2013/53/EU, enforce Stage IIIA/B limits for spark-ignition outboards, with CO at 150–300 g/kWh and HC+ at 16–75 g/kWh depending on power, though updates toward Stage V alignment remain under review without mandatory adoption as of 2025. These standards prioritize engine-out reductions via aftertreatment like for in diesel NRMM, though real-world compliance varies due to diverse operating conditions outside lab tests.
Engine Power (kW) (g/kWh)PM (g/kWh)CO (g/kWh)HC+ (g/kWh, SI)
<190.400.0155.050
19–370.400.0155.0-
37–560.460.0155.0-
56–1300.460.0155.0-
>1300.460.0153.5-
This table summarizes Stage V limits for NRMM compression-ignition engines; spark-ignition variants have separate HC+NOx caps.

CO2 and Greenhouse Gas Regulations

Fleet-Wide CO2 Emission Targets

The European Union mandates fleet-wide CO₂ emission targets for manufacturers of new passenger cars, light commercial vehicles (vans), and heavy-duty vehicles, requiring each manufacturer to achieve an average emissions level across their EU sales that meets or undercuts specific limits calculated based on vehicle mass and other factors. These targets, distinct from pollutant standards under Euro norms, aim to drive reductions through technology improvements, electrification, and efficiency measures, with non-compliance incurring financial penalties calculated per excess gram of CO₂ per vehicle. Compliance is assessed annually using type-approval test data, allowing pooling of excess emissions credits across manufacturers or banking for future use. For passenger cars and vans, Regulation (EU) 2019/631 establishes the framework, setting an fleet-wide target of 95 g CO₂/km for new passenger cars and 147 g CO₂/km for new vans from January 1, 2020, with manufacturer-specific targets derived from the fleet average and adjusted for the transition to WLTP testing (resulting in an equivalent 2021-2024 fleet target of approximately 118 g/km for cars based on declared WLTP values). From 2025 to 2029, targets require a 15% reduction in average emissions compared to 2021 baselines, followed by a 55% reduction for cars and 50% for vans from 2030 to 2034 relative to 2021 levels; from 2035 onward, the fleet-wide target is 0 g CO₂/km for both categories, effectively prohibiting new vehicles without zero-tailpipe-emission technology. Specific manufacturer targets incorporate derogations for niche vehicles and super-credits for low-emission models (e.g., multiplying zero-emission vehicle counts by 1.6 until 2026), though real-world emissions often exceed lab-measured values due to factors like driving conditions. In response to slower adoption, the adopted flexibility measures in May 2025, allowing a three-year compliance deferral for the 2025 targets to avoid immediate fines. Heavy-duty vehicles, including trucks, buses, and trailers, fall under Regulation (EU) 2019/1242, which introduced the first EU-wide CO₂ standards requiring a 15% reduction in average emissions from new by 2025 compared to 2019 certified baselines, measured via simulation tools like VECTO. The regulation was revised in 2024 to accelerate decarbonization, mandating fleet-wide reductions of 45% by 2030, 65% by 2035, and 90% by 2040 relative to 2019 levels, with sub-targets differentiated by (e.g., urban buses prioritized for higher cuts due to feasibility). Penalties for exceedance are €40,000 per of excess CO₂ per , with similar pooling and banking mechanisms; early assessments indicate most manufacturers are on track for the 2025 target through gains and initial zero-emission deployments, though full compliance with later milestones will demand substantial shifts to battery-electric and .
Vehicle Category2020-2024 Baseline (g CO₂/km or equivalent)2025-2029 Reduction2030-2034 Reduction2035+ Target
Passenger Cars95 (NEDC; ~118 WLTP equiv.)15% vs. 202155% vs. 20210 g/km
147 (NEDC)15% vs. 202150% vs. 20210 g/km
Heavy-Duty Vehicles2019 certified baseline15% vs. 201945% vs. 201990% vs. 2019 (by 2040)

Integration with Broader Decarbonization Policies

The European Union's CO2 emission standards for light-duty vehicles are integrated into the overarching , launched in 2019, which establishes a roadmap for climate neutrality by 2050 through economy-wide greenhouse gas reductions. These standards, governed by Regulation (EU) 2019/631, impose fleet-average CO2 targets on manufacturers, requiring a 15% reduction for new cars and vans registered from January 1, 2025, relative to 2021 baselines, escalating to 55% for cars and 50% for vans by 2030, and reaching zero grams of CO2 per kilometer from 2035 onward. This progression supports the EU's binding target, enshrined in the 2021 European Climate Law, of at least a 55% net reduction in GHG emissions by 2030 compared to 1990 levels, with transport—accounting for about 25% of EU emissions—targeted for substantial contributions via electrification and low-emission alternatives. The package, adopted in 2021, embeds vehicle CO2 regulations within a suite of revised directives and regulations to align decarbonization with broader sectoral efforts, including expansions of the Emissions Trading System to road fuels and revisions to national emissions allocations under the Effort Sharing Regulation. For heavy-duty vehicles, complementary CO2 standards under Regulation (EU) 2019/1242 set 2025 targets at 15% below 2019-2020 levels for trucks and buses, with further reductions to 45% by 2030 and 90% by 2040, facilitating integration with modal shift policies promoting rail and waterborne to reduce road dependency. These targets incentivize zero-emission technologies, but their net environmental impact hinges on concurrent decarbonization of , as electric vehicles' lifecycle emissions correlate with grid carbon intensity, which the EU addresses through renewable energy mandates aiming for 42.5% renewables in final energy consumption by 2030. Synergies extend to fuel and infrastructure policies, such as the revised Renewable Energy Directive (RED III), which sets a 14% greenhouse gas intensity reduction target for transport fuels by 2030, incorporating advanced biofuels and e-fuels to complement vehicle standards without relying solely on battery electrics. The Alternative Fuels Infrastructure Regulation mandates widespread charging networks, with member states required to deploy one public charger per 60 electric vehicles by 2025, scaling to 10 km maximum gaps between stations by 2030, thereby enabling the fleet transition envisioned in CO2 targets. Ongoing reviews, including a scheduled 2026 assessment of the 2035 zero-emission mandate amid challenges like slower electric vehicle adoption, underscore adaptive integration to balance decarbonization ambitions with technological and economic feasibility.

2035 Internal Combustion Engine Phase-Out and Ongoing Reviews

In December 2022, the and Council adopted Regulation (EU) 2023/851, amending Regulation (EU) 2019/631 on CO2 emission performance standards for new passenger cars and light commercial vehicles, establishing a target of 100% reduction in fleet-average CO2 emissions from 2035 onward relative to the 2021 baseline. This measure effectively prohibits the registration of new (ICE) vehicles that emit CO2 under standard testing unless offset by zero-emission vehicles in manufacturers' fleets, aligning with the EU's "" package to reduce net by at least 55% by 2030 compared to 1990 levels. Intermediate targets require a 55% reduction for cars and 50% for vans by 2030, with post-2035 compliance limited to battery electric vehicles, hydrogen fuel-cell vehicles, or ICE vehicles powered by climate-neutral synthetic fuels (e-fuels) under specific conditions outlined in recital 111 of the regulation. The policy does not ban existing ICE vehicles or retrofits but targets new registrations to drive a transition toward zero-emission mobility, with the estimating it will avoid 430 million tonnes of CO2 emissions between 2030 and 2050 while supporting the EU's 2050 climate neutrality goal. However, e-fuel provisions remain narrow: vehicles must demonstrate zero tailpipe CO2 emissions via fuels produced using and captured CO2, though scalability challenges persist, as e-fuel production costs exceed €20 per liter and global capacity is projected at under 5% of road fuel demand by 2030 without massive investment. Critics, including the International Council on Clean Transportation, argue e-fuels divert resources from , given their lower efficiency (typically 20-30% well-to-wheel versus over 70% for batteries) and reliance on unproven carbon capture at scale. Ongoing reviews of the regulation, mandated by Article 14 of Regulation (EU) 2019/631 as amended, are accelerating amid slow adoption— battery electric sales share fell to 13.6% in early 2025 from 14.6% in 2024—and industry lobbying from groups like the (ACEA), which contends the 100% target is unfeasible due to insufficient charging (only 0.7 million public points versus a needed 30 million by 2030) and raw material constraints. In July 2025, the Commission launched a on revising CO2 targets, focusing on e-fuels, plug-in hybrids, and biofuels, with a formal review report due by late 2025 or early 2026, potentially adjusting post-2035 flexibilities but upholding the zero-emission mandate absent technological breakthroughs. and have opposed dilutions, emphasizing the 2035 deadline's role in , while automakers advocate retaining options with low-carbon fuels to avoid job losses estimated at 500,000 in the sector. A 2025 Commission announcement confirmed fast-tracking the review to address automotive competitiveness, incorporating real-world data on EV affordability (average battery prices 20-30% above ICE equivalents) and grid capacity limits, but preliminary indications suggest no outright reversal of the phase-out, with e-fuels positioned as a niche exemption rather than a core pathway. The review process, informed by stakeholder input and impact assessments, will evaluate causal links between targets and decarbonization outcomes, potentially incorporating updated lifecycle analyses to assess e-fuel viability against empirical EV deployment data showing slower-than-expected uptake in rural and cold-climate regions.

Testing Methodologies

Light-Duty Vehicle Test Cycles

The New European Driving Cycle (NEDC), introduced in the early 1990s and formalized under Directive 70/220/EEC, served as the primary laboratory test procedure for certifying pollutant emissions from light-duty vehicles (categories M1 passenger cars and light commercial vehicles up to 3.5 tonnes) through Euro 6 standards until 2017. This test combined an urban driving cycle (derived from ECE Regulation 15, lasting 780 seconds with average speeds of 19 km/h and maximum 50 km/h) and an extra-urban highway cycle (EUDC, 400 seconds with average 63 km/h and peaks to 120 km/h), totaling approximately 11 km over 20 minutes, but its simplified acceleration profiles and lack of real-world variabilities like loads systematically underestimated emissions, with real-world levels from diesel vehicles often exceeding lab results by factors of 4 to 7 in early post-2010 fleets. To address these discrepancies, revealed prominently by the 2015 involving defeat devices optimized for NEDC conditions, the adopted the Worldwide Harmonized Light Vehicles Test Procedure (WLTP) via Regulation (EU) 2017/1151, mandating its use for new type approvals from September 2017 (Euro 6c) and extending to all new vehicles by September 2019. WLTP employs the Worldwide Harmonized Light-duty Test Cycle (WLTC), a 30-minute sequence spanning 23.3 km with dynamic phases at low (urban-like, average 25.2 km/h), medium (46.5 km/h), high (56.5 km/h), and extra-high (92.1 km/h) speeds, incorporating steeper accelerations, gear shifts based on actual vehicle specifications, and options for road load simulations that better approximate diverse driving realities, resulting in reported CO2 emissions typically 20-30% higher than NEDC equivalents for the same vehicles. Vehicle-specific parameters, such as mass and aerodynamics, are factored into cycle adaptations across four classes (A-D by power-to-mass ratio), with hybrid utility factors derived empirically to apportion electric and combustion operation. Complementing WLTP's laboratory focus, Real Driving Emissions (RDE) testing was integrated into 6 standards from 2017 (phased via Euro 6d-TEMP and Euro 6d) to enforce conformity under uncontrolled on-road conditions using portable emissions measurement systems (PEMS) on public routes. RDE requires vehicles to cover urban, rural, and motorway segments totaling at least 90 minutes and 22 km, with and particulate number emissions capped by multiplying lab limits with temporary conformity factors (initially 2.1 for , reduced to 1.43 from January 2021 and 1.0 targeted post-2025 under Euro 7 proposals), though PN limits retain higher factors to account for cold-start and regeneration events not fully captured in runs. Empirical data from RDE deployments indicate it has curbed cycle-beating optimizations, with compliant fleets showing real-world reductions of up to 80% relative to pre-WLTP diesels, albeit with ongoing challenges in cold weather and high-load scenarios where factors may still permit exceedances. Euro 6e, effective from 2023, refines these protocols by eliminating the temporary NEDC-to-WLTP bridging and tightening in-service conformity checks, while proposed Euro 7 (Regulation (EU) 2023/xxx, pending full implementation) extends WLTP/RDE to non-exhaust sources like brakes and tires without altering core drive cycles. These evolutions prioritize causal alignment between certified and actual emissions, though independent audits highlight persistent gaps, such as WLTP overestimating efficiency for aggressive drivers by 10-15%.

Heavy-Duty Vehicle Test Protocols

Heavy-duty vehicle emission testing in the focuses on engine-level measurements rather than whole-vehicle tests, owing to the diverse sizes, configurations, and operational demands of trucks and buses. Engines are evaluated on an engine dynamometer using standardized cycles to simulate steady-state and transient operating conditions, with limits applied per (kWh) of work. This approach, governed by UN/ECE Regulation No. 49 and implemented via EU directives and regulations such as Directive 1999/96/EC for Euro III-V and Regulation (EU) No. 582/2011 for Euro VI, ensures comparability across engine families while accounting for aftertreatment systems like (SCR). For diesel (compression-ignition) engines under III to V standards (introduced 2000-2008), type-approval required the European Steady-state Cycle (ESC) for steady-state testing—comprising 13 modes at fixed speeds and loads—and the European Transient Cycle (ETC) for transient operation, with emissions weighted across phases including urban, rural, and highway simulation. Positive-ignition (gas) engines used only the ETC. VI (effective 2013 for engines, 2014 for vehicles) shifted to the globally harmonized Worldwide Harmonized Stationary Cycle (WHSC) for diesel steady-state testing—featuring 6 modes with ramped load transitions—and the Worldwide Harmonized Transient Cycle (WHTC) for transient testing of both diesel and gas engines, incorporating cold/hot start phases and a broader speed-torque map derived from real-world data. These cycles, detailed in Annex 4B of UN/ECE R49, better represent modern engine maps and include particle number (PN) measurement from VI-B onward using solid particle counters. To address laboratory-to-real-world discrepancies, Euro VI introduced off-cycle emissions (OCE) provisions under Regulation (EU) No. 582/2011, mandating not-to-exceed (NTE) zones in lab tests (e.g., limited to 0.60 g/kWh in certain torque/speed areas) and confirmatory PEMS (Portable Emissions Measurement Systems) testing during type-approval. PEMS, installed on vehicles for on-road measurement of CO2, , PN, and other pollutants, uses GPS and to calculate work-based emissions via the moving averaging window (MAW) method, requiring at least 90% of valid windows to fall below conformity factors (CFs)—initially 1.5 for gaseous pollutants and later tightened to 1.63 for PN in Euro VI-E (from 2020). In-service conformity (ISC) testing, required after 25,000 km or within 18-40 months of registration depending on the step, applies PEMS over mixed urban (20% power threshold initially), rural, and motorway routes, with family-based sampling of at least 5-10 vehicles per family to verify sustained compliance over useful life (e.g., 700,000 km for long-haul trucks). Euro VI-E added cold-start PEMS at -7°C to -30°C for diesel and extended PN CFs to gas engines from 2023. These protocols have evolved to incorporate durability demonstration through bench-aging or on-road accumulation, with deterioration factors applied to lab results (e.g., multiplicative for NOx), ensuring emissions remain below limits throughout the engine's lifetime. While effective for certification, empirical data indicate real-world NOx emissions from Euro VI trucks often exceed lab limits by factors of 2-10 under high-load conditions, prompting ongoing refinements like Euro VII proposals (Regulation 2024/1257, effective 2028) that integrate full RDE with CF 1.0 and lower power thresholds (6%).
Test TypeCycle/MethodEngine ApplicabilityKey FeaturesIntroduction
Steady-State LabWHSC (Euro VI+)Diesel only6 modes, ramped transitions, weighted emissions2013
Transient LabWHTC (Euro VI+)Diesel & GasCold/hot starts, 30-min cycle, PN measurement2013
Real-WorldPEMS (ISC/OCE)AllOn-road MAW, CF limits (e.g., NOx 1.5 g/kWh), mixed routesEuro VI (2013)

Real-World Driving Emissions and Cycle Beating Issues

Cycle beating refers to the practice where vehicle manufacturers optimize engine management systems to minimize emissions specifically during standardized laboratory test cycles, such as the New European Driving Cycle (NEDC), resulting in significantly higher pollutant outputs under real-world driving conditions. This discrepancy arose because the NEDC's predictable, low-speed profile allowed for tailoring , exhaust aftertreatment, and other parameters to the test sequence, often at the expense of performance in varied on-road scenarios like acceleration, cold starts, or urban traffic. For instance, Transport & Environment analysis highlighted how such optimization led to elevated (CO), hydrocarbons (HC), and (NH3) emissions outside the test cycle. Empirical studies using portable emissions measurement systems (PEMS) demonstrated stark gaps for nitrogen oxides () from diesel passenger cars. Under Euro 6 standards, which set a laboratory limit of 80 mg/km, real-world NOx emissions averaged 4.5 times the limit across tested Euro 6 diesel models, with some exceeding by factors of 10 or more, according to a 2017 International Council on Clean Transportation (ICCT) compilation of 541 vehicles. Earlier tests on top-selling Euro 6 diesels showed averages over six times the limit, underscoring systemic issues beyond isolated cheating scandals like Volkswagen's Dieselgate. These findings, corroborated by on-road campaigns, indicated that even compliant type-approval vehicles failed to translate lab reductions to ambient air quality improvements. To mitigate cycle beating, the introduced Real Driving Emissions (RDE) testing as part of Euro 6d standards, effective from September 2017, requiring on-road validation with PEMS under diverse conditions including urban, rural, and highway driving. RDE incorporates not-to-exceed (NTE) conformity factors, initially set at 2.1 times the lab limit for (168 mg/km), tightening to 1.43 by January 2021, with plans for further alignment. Despite these measures, challenges persist: a 2021 ICCT study in found some Euro 6d-TEMP diesel models emitting up to 0.220 g/km , exceeding tightened thresholds, while factors like cold-weather operation and variability can amplify outputs. Recent on-road data from Euro 6c and 6d vehicles show reductions in black carbon and due to diesel particulate filters (DPF) and RDE enforcement, yet median exceedances remain for certain fleets compared to counterparts post-Euro 6b. Ongoing assessments by the (JRC) emphasize that while RDE has narrowed the lab-real world gap—reducing average multipliers from over 5 pre-RDE to around 1.5-2 post-implementation—full remains elusive due to inherent test variabilities and the need for robust aftertreatment systems across all conditions. Critics argue that without eliminating factors entirely, some cycle optimization persists, though links RDE to verifiable fleet-wide declines in monitored regions.

Environmental and Health Impacts

Measured Reductions in Pollutants and Empirical Evidence

Between 1990 and 2022, nitrogen oxides () emissions from transport in the EU-27 decreased by 51%, with road transport contributing the majority of this reduction through the progressive implementation of standards that tightened limits from Euro 1 (1992) onward. Similarly, particulate matter (PM10) emissions from transport fell by 42% over the same period, driven by standards mandating diesel particulate filters (DPFs) starting with 5 (2009) for light-duty vehicles and VI (2013) for heavy-duty. (CO) emissions from transport declined by 68%, reflecting requirements introduced in 1. These sectoral emission inventories, compiled by the (EEA), attribute the bulk of transport-related declines to technological improvements enforced by emission standards, alongside fleet renewal. Empirical on-road measurements confirm partial realization of these reductions, though real-world NOx emissions from diesel vehicles often exceed laboratory type-approval limits. A 2019 Concawe study of Euro 6 diesel passenger cars using portable emissions measurement systems (PEMS) found successive sub-stages (Euro 6b to 6d) reduced real-world by up to 70% under varied driving conditions, approaching but not fully meeting lab conformity factors post-real driving emissions (RDE) introduction in 2017. For heavy-duty Euro VI vehicles, 2019 PEMS data indicated average emissions 0.3-0.5 g/kWh under real operations, below prior Euro V levels but still 2-3 times the 0.4 g/kWh limit in some scenarios due to engine load variations. PM reductions have been more consistent, with DPF-equipped Euro 6 diesels achieving 88-95% cuts in (a PM component) compared to pre-DPF Euro 4 vehicles in on-road tests. Despite these vehicle-level gains, ambient air quality data reveal that Euro standards' impact on urban pollutant concentrations is modulated by fleet age, non-exhaust sources (e.g., /road wear, now 50% of PM from roads), and traffic volume growth. EEA monitoring shows EU urban levels dropped 40-50% from 2000-2020 in major cities, correlating with 4-6 adoption, yet exceedances persist in 20-30% of stations due to older vehicles and secondary formation. Independent analyses, such as those estimating non-compliant contributions, suggest that without stricter enforcement post-Dieselgate (2015), real-world fleet averages would have been 20-50% higher, underscoring standards' causal role amid compliance gaps. Overall PM2.5 from has declined, but non-exhaust fractions have risen, offsetting 10-20% of exhaust gains since 2010.

Attributable Health Outcomes and Causal Assessments

Air pollution from road vehicles, primarily particulate matter (PM), nitrogen oxides (NOx), and volatile organic compounds, contributes to the formation of fine particulate matter (PM2.5), nitrogen dioxide (NO2), and ground-level ozone (O3), which are linked epidemiologically to increased risks of ischemic heart disease, stroke, chronic obstructive pulmonary disease (COPD), lung cancer, diabetes, and asthma exacerbations. These associations derive from cohort studies and meta-analyses applying concentration-response functions, such as those in the Global Burden of Disease framework, which model excess mortality and morbidity based on exposure levels above assumed thresholds. However, causal inference remains challenged by confounding factors like socioeconomic status, smoking, and multi-pollutant interactions, with no randomized controlled trials available; evidence relies on observational data and atmospheric modeling that cannot fully isolate vehicle-specific contributions from other sources such as industry or residential heating. In the EU-27 for 2022, the (EEA) estimated 239,000 premature deaths attributable to long-term PM2.5 exposure exceeding the (WHO) guideline of 5 μg/m³, alongside 48,000 from NO2 above 10 μg/m³ and 70,000 from O3 above 60 μg/m³ (as a 90th of maximum daily 8-hour means). These figures reflect integrated exposure-response models calibrated to European cohorts, projecting years of life lost (YLL) and disability-adjusted life years (DALYs), with PM2.5 driving the majority through cardiopulmonary pathways. Transport-related emissions, curtailed by successive standards since 1992, accounted for a declining but notable share; for instance, on-road vehicles were modeled to contribute to approximately 67% of transport-attributable PM2.5 and O3 impacts in earlier assessments around 2015, when total EU-27 premature deaths from these pollutants reached 215,000. Morbidity burdens include over 100,000 new COPD cases and substantial childhood incidences annually, with economic valuations exceeding €100 billion in avoided healthcare and productivity losses, though such monetizations depend on willingness-to-pay assumptions. Temporal trends show PM2.5-attributable deaths declining 45% from 2005 to 2022, aligning with a 51% drop in transport emissions (1990-2022) despite rising vehicle kilometers traveled, attributable in part to standards tightening PM and limits for light- and heavy-duty vehicles. Modeling studies, such as those evaluating compliance with 5/6 norms, estimate that full adherence avoided tens of thousands of premature deaths by reducing real-world and PM exceedances; conversely, non-compliance in diesel vehicles (e.g., via defeat devices) is projected to cause 205,000 excess deaths across the EU and from 2009-2040 through elevated O3 and PM2.5 formation. Country-specific analyses, like those for and , quantify benefits from stricter standards as 1,000-2,000 avoided deaths annually per nation by 2030, using source-apportionment models linking emission inventories to endpoints, though these projections assume linear dose-responses and neglect adaptations like switching. Causal assessments employ tools like the GEOS-Chem chemical transport model integrated with emission inventories to simulate counterfactual scenarios without standards, revealing that Euro implementations correlated with urban NO2 declines of 20-40% in high-traffic areas, reducing associated and risks. Limitations include over-reliance on global meta-analyses that may overestimate low-concentration effects—debated in toxicological literature for PM2.5—and failure to disentangle primary exhaust from non-exhaust sources (e.g., , brakes), which now dominate urban PM inventories. Peer-reviewed critiques highlight potential biases in attribution, as EEA and similar estimates from institutions like the International Council on Clean Transportation often advocate policy stringency, incorporating conservative assumptions that amplify vehicle-specific burdens relative to baselines without rigorous sensitivity testing for confounders. Empirical validation from low-emission zones shows modest mortality reductions (e.g., 1-2% in cardiovascular events), supporting but not proving standards' isolated efficacy. Overall, while emission reductions under norms empirically track health improvements, definitive causal quantification requires advanced econometric methods like difference-in-differences across regulatory borders, which remain sparse.

Comparative Effectiveness Against Baseline Scenarios

European emission standards have achieved substantial reductions in vehicle pollutant emissions relative to baseline scenarios extrapolating pre-regulation trends or voluntary industry commitments. For light-duty vehicles, mandatory CO2 targets under Regulations 443/2009 and 510/2011 drove annual reductions of 3.4-4.8 gCO2/km from 2006-2013, compared to projected 1.1-1.9 gCO2/km under prior voluntary agreements, accounting for 65-85% of observed tailpipe emission declines since 2009 after controlling for factors like fuel prices and economic conditions. Similarly, for nitrogen oxides (NOx) from diesel passenger cars, real-world emissions averaged 453 mg/km (5.7 times the Euro 6 lab limit of 80 mg/km) prior to real-driving emissions (RDE) enforcement; modeling projects that RDE implementation reduces fleet-average NOx by 63% to 168 mg/km under conservative scenarios and up to 79% to 96 mg/km under accelerated technology adoption by 2030, versus persistence at pre-RDE levels without regulatory alignment of lab and real-world testing. These gains exceed business-as-usual projections, where market-driven improvements alone historically lagged, as evidenced by stagnant emissions under voluntary pacts before mandatory Euro phases. In terms of particulate matter (PM) and , empirical monitoring confirms alignment with standards for petrol vehicles, with real-world falling in tandem with tightening limits since Euro 1 in 1992, while diesel fleets showed larger gaps until post-2017 RDE corrections. Counterfactual analyses attribute vehicle standards to a significant share of Europe's air quality improvements, including a 14-16% drop in PM10 and PM2.5 from 2002-2011, beyond contributions from other sectors. Without standards, emissions modeling suggests continued reliance on older, higher-emitting fleets would elevate urban concentrations by 20-50% in high-traffic areas, based on pre-Euro trend extrapolations. Health outcomes reflect these divergences, with standards averting premature mortality tied to excess pollutants. Projections for Euro 7 indicate 5,000-10,000 fewer premature deaths annually by 2030 compared to extending Euro 6 without further tightening, through reduced PM2.5 and exposure; historical baselines without progressive standards would amplify such risks, as excess from non-compliant diesels (e.g., via defeat devices) correlated with hundreds of additional deaths in affected regions like . Overall, while real-world compliance shortfalls like Dieselgate eroded some gains—yielding emissions 4-5 times limits in early Euro 6 diesels—the standards' enforcement mechanisms have causally lowered population-level exposures versus unregulated trajectories, supported by regression controls for confounders in air quality data.

Economic and Industry Effects

Compliance Costs for Manufacturers and Consumers

Manufacturers incur substantial compliance costs for European emission standards, encompassing , hardware upgrades such as advanced particulate filters and systems, and rigorous certification testing. The implementation of Euro 6 standards, effective from September 2014 for light-duty s, required diesel s to incorporate urea-based SCR technology to meet nitrogen oxides limits, with incremental direct costs estimated at 500-1,500 euros per depending on engine size and application. For heavy-duty s under Euro VI (introduced in 2013), similar aftertreatment systems added 2,000-5,000 euros per , driven by the need for and periodic maintenance requirements. Prospective costs for Euro 7, proposed in 2022 and under revision as of 2025, amplify these burdens; the European Commission's projected additional direct costs of 180-450 euros for passenger cars and vans and 2,800 euros for trucks compared to Euro 6/VI baselines. However, a 2023 analysis by Frontier Economics, drawing on industry expert consultations commissioned by the (ACEA), found these figures understated by a factor of 4 to 10, with average incremental costs reaching 1,000-4,500 euros for light-duty vehicles due to expanded particle number limits, and emission controls, and enhanced real-driving emissions testing. Non-compliance with parallel CO2 fleet targets, such as the 95 g/km limit enforced from 2020, incurs fines of 95 euros per excess gram per kilometer sold, potentially amounting to billions in penalties for manufacturers exceeding targets, as seen in projected 2025 shortfalls prompting calls for regulatory relief. These expenses are partially transmitted to consumers via elevated vehicle prices, as manufacturers recover investments amid competitive pressures. A 2011 study on regulatory effects found that compliance costs for emission standards often exceed observed price adjustments, implying partial absorption by producers, yet empirical data from 2002-2010 showed average new car prices rising in tandem with successive standards despite efficiency gains. Stricter norms have contributed to price premiums of 5-10% on compliant models; for example, post-Euro 6 diesel vehicles commanded 1,000-2,000 euros more than predecessors, reflecting added hardware without proportional resale value retention. Consumers also bear indirect costs, including higher maintenance for complex emission systems—such as replacements costing 500-1,500 euros every 100,000-200,000 km—and reduced vehicle longevity incentives, as operators delay replacements amid affordability concerns under proposed Euro 7 mandates.
Standard TransitionEstimated Incremental Cost per Light-Duty Vehicle (Euros)Primary Cost DriversSource Attribution
Euro 5 to 6 (2014)500-1,500SCR systems, MIT CEEPR analysis
Euro 6 to Euro 7 (proposed)1,000-4,500 (industry est.); 180-450 (EC est.)Particle controls, RDE expansion, non-tailpipe emissionsFrontier Economics/ACEA vs. EC
Economic modeling of EU standards from 2009 onward indicates net welfare losses for consumers, with surplus reductions from pricier technologies outweighing emission benefits in some assessments, particularly as firms adopt suboptimal abatement to minimize short-term penalties. In response to 2025 CO2 targets and impending Euro 7, manufacturers have raised prices on vehicles by 5-15% while discounting electric alternatives, signaling cost passthrough amid mandates.

Job Impacts and Competitiveness in the Automotive Sector

The European automotive sector, which directly and indirectly employs over 13 million people across , supply chains, and related services, has faced significant pressures from progressively stricter Euro emission standards and associated CO2 fleet regulations. These rules, including Euro 6 for pollutant emissions and the package's CO2 targets requiring a 55% reduction for cars by 2030 from 2021 levels, have accelerated the shift from internal combustion engines to electric vehicles, disrupting traditional production lines and supplier networks. Compliance costs, including investments and potential fines reaching up to €15 billion for 2025 CO2 targets, have contributed to plant rationalizations and workforce reductions, particularly in diesel-heavy regions like . Empirical evidence links these standards to tangible job losses, with Germany's auto industry alone shedding 51,500 positions between June 2024 and June 2025 amid weak demand and high transition costs driven by emission mandates. Manufacturers such as have reported specific plant closures and layoffs in countries like and , attributing them to the need to retool for lower-emission technologies under Euro norms and CO2 rules, which favor over incremental engine improvements. Upstream suppliers, accounting for up to 55% of sector , have been disproportionately affected, as emission compliance reduces demand for components like exhaust systems and diesel parts while new EV supply chains lag in compared to . Industry analyses indicate that without policy relief, such as the requested adjustments to 2025 CO2 targets, further contractions could exacerbate these trends, with historical precedents like the post-2009 emission tightening showing initial welfare costs through higher vehicle prices and reduced output. On competitiveness, Euro standards have imposed asymmetric burdens on EU manufacturers, elevating production costs by an estimated 10-20% for compliant vehicles relative to global rivals with laxer regulations, eroding export market shares in regions like and emerging markets. The has acknowledged risks of losing significant zero-emission vehicle market shares due to insufficient domestic battery production and higher expenses, prompting calls for an "Automotive " to bolster R&D and shield against unfair competition from subsidized Chinese imports. For instance, while EU firms invested heavily in Euro 6 diesel technologies post-Dieselgate, the pivot to CO2-driven has left them trailing Tesla and Chinese OEMs in cost efficiency, with EU production costs 20-30% above global averages as of 2025. This has fueled industry advocacy for reviewing the 2035 CO2-emitting vehicle phase-out, as unmitigated standards could hollow out domestic capacity without corresponding demand incentives or trade protections.

Empirical Studies on Productivity and Growth Influences

A study analyzing environmental policy stringency in the euro area from 2003 to 2019, using the Environmental Policy Stringency (EPS) index—which incorporates regulations including vehicle emission standards—found that tighter regulations reduce (TFP) growth, particularly for high-polluting firms and countries. A one standard deviation shock in EPS led to a 4 decline in TFP growth over five years for high-polluting firms, equivalent to about one-third of their median annual TFP growth rate of 2.6%; at the country level, high-polluting euro area nations experienced a 2.8 TFP reduction over the same horizon. Low-polluting entities showed negligible or slightly positive effects, rejecting the that stringent regulations broadly enhance competitiveness through innovation. Command-and-control environmental policies, such as emission standards, exhibit insignificant or weakly negative effects on multifactor productivity (MFP) and innovation accumulation in manufacturing sectors from 1995 to 2008, contrasting with positive impacts from market-based tools like the Emissions Trading System (ETS) and environmental taxes. Emission standards targeting reductions showed no significant influence on labor productivity or ICT/R&D capital deepening across 11 countries plus the . In the , empirical analysis of post-2009 CO2 emission standards for light-duty revealed accelerated laboratory-based technological adoption, doubling the pace of improvements, but at the cost of higher production expenses and reduced firm profits without corresponding price adjustments or vehicle downsizing. Real-world consumption gaps widened to over 50% by 2014 due to test manipulation, eroding actual CO2 reductions to about 5% against an 18% target and implying limited net benefits from diverted R&D resources. Overall, no studies identify causal boosts to aggregate from European emission standards; resource reallocation toward compliance appears to constrain TFP in regulated sectors without offsetting spillovers to broader .

Controversies and Criticisms

Regulatory Overreach and Economic Burdens

Critics of the European Union's vehicle emission standards contend that regulations such as the Euro 7 framework exemplify overreach by extending controls to non-tailpipe sources like and wear particles, alongside ultra-low exhaust limits and extended mandates, despite marginal projected reductions in urban concentrations already nearing natural background levels under Euro 6. The original November 2022 Euro 7 proposal, which included particle number limits for brakes and roads starting in 2026, faced industry backlash for lacking sufficient evidence that such expansions would deliver proportional health benefits, prompting dilutions in the final regulation adopted in April 2024, with light-duty implementation delayed to 2027 and relaxed thresholds for non-exhaust emissions. Compliance costs underscore these burdens, with the (ACEA) estimating incremental expenses of up to €2,000 per passenger car and €12,000 per heavy-duty diesel vehicle for Euro 7, driven by advanced aftertreatment systems, sensors, and R&D—figures four to ten times higher than the European Commission's projections of €180–450 for cars and €2,800 for trucks. Independent analyses using the Commission's external cost handbook methodology reveal that air quality benefits, primarily from and PM reductions, support vehicle price increases of only €126 for diesel cars and €21 for petrol cars under stringent scenarios, failing to offset full technology costs and yielding negative benefit-cost ratios in many cases. Indirect effects exacerbate this, including 3.5% higher fuel consumption from added vehicle weight and complexity, equating to lifetime extras of €700 per car or €17,500 per truck, alongside forgone model options for smaller manufacturers. These regulatory impositions have ripple effects on the economy, elevating new vehicle prices—historical standards like the 2009 CO2 targets correlated with €500–1,000 hikes per car, diminishing consumer surplus by restricting affordable choices—and eroding industry competitiveness against regions like , where laxer standards enable lower-cost production. ACEA analyses warn that Euro 7's stringency, absent equivalents elsewhere, accelerates and market share erosion, with the sector's global position weakening amid cumulative compliance demands that divert investments from innovation to regulatory adherence. While Commission assessments claim net societal gains from reduced externalities, skeptics highlight undercounted and question the causal linkage to verifiable improvements, arguing the approach prioritizes precautionary stringency over pragmatic cost-effectiveness.

Dieselgate Scandal and Enforcement Failures

The Dieselgate scandal, centered on Group's use of defeat devices in diesel engines, was publicly revealed on September 18, 2015, when the U.S. Environmental Protection Agency accused the company of equipping approximately 11 million vehicles worldwide—including about 8 million in —with software that detected laboratory testing conditions and temporarily activated full emissions controls, resulting in real-world (NOx) emissions up to 40 times the certified limits. This cheating mechanism exploited the rigid, predictable (NEDC) protocol used for standards compliance, which featured low speeds, minimal acceleration, and no real-road variability, making it simpler to game than U.S. Federal Test Procedure equivalents. 's former CEO, , resigned on September 23, 2015, amid admissions that the software had been deployed since at least 2009 to meet stringent NOx caps under 5 and early 6 standards, prioritizing sales of "clean diesel" models promoted for their efficiency. Pre-Dieselgate enforcement under the EU's type-approval system revealed systemic vulnerabilities, as national authorities—often with close industry ties, particularly Germany's Kraftfahrt-Bundesamt—handled certifications based largely on manufacturer-provided data and lab tests conducted by potentially conflicted third-party facilities, without mandatory independent on-road validation or random audits until reforms. This framework permitted not only Volkswagen's deliberate fraud but also broader discrepancies, with independent measurements showing 4 and 5 diesel passenger cars emitting at 4 to 5 times lab limits on actual roads, and even early 6 vehicles exceeding by factors of 5 to 16 times due to optimized lab-specific aftertreatment systems that underperformed under variable real-world conditions like cold starts or dynamic loads. The later critiqued the process for fragmented oversight, where component emissions testing could occur separately from whole-vehicle approval, enabling inconsistencies and insufficient scrutiny of software integrity. Consequences in Europe diverged sharply from the U.S., where incurred over $15 billion in settlements, buybacks, and fixes for 500,000 affected vehicles; in the , fines totaled around €1.6 billion by 2020 across member states, with only partial recalls and software updates for 8.5 million cars, many of which failed to fully mitigate excess emissions due to hardware limitations and less stringent remediation mandates. Consumer compensation remained fragmented, with ongoing litigation in countries like and the yielding modest payouts compared to U.S. class actions, highlighting enforcement disparities rooted in weaker civil liability frameworks and reliance on national courts rather than unified mechanisms. The scandal prompted incremental reforms, including the phased introduction of Real Driving Emissions (RDE) testing under Euro 6d-TEMP from 2017, which imposed conformity factors allowing temporary exceedances up to 2.1 times lab limits during portable emissions measurement system (PEMS) on-road evaluations, though critics noted these tolerances still permitted significant real-world outputs exceeding health-based thresholds. Despite these changes, investigations uncovered similar usage or optimization flaws in other manufacturers like Daimler and , underscoring persistent gaps in pre-market verification and post-market .

Debates on Mandated Electrification vs. Technological Alternatives

The European Union's regulation under the package mandates that new passenger cars and vans registered from 2035 onward must produce zero tailpipe CO2 emissions, effectively prohibiting sales of new vehicles powered solely by internal combustion engines (ICE) unless they utilize carbon-neutral fuels or technologies like battery electric vehicles (BEVs) or hydrogen fuel cells. This policy shifts focus from traditional Euro emission standards targeting pollutants like and particulates toward aggressive CO2 reduction, prioritizing as the primary pathway to net-zero transport by 2050. Proponents of mandated , including environmental advocacy groups, argue it accelerates decarbonization by leveraging BEVs' potential for 66-73% lower lifecycle compared to gasoline counterparts in , assuming grid decarbonization progresses as planned. The International Council on Clean Transportation (ICCT) cites empirical data showing BEVs' upstream emissions from battery production are offset within 1-2 years of use in the EU's increasingly renewable grid, with total lifecycle advantages widening over time. Policymakers emphasize that technology-neutral approaches risk slower adoption, as historical ICE efficiency gains have plateaued, failing to meet targets without enforced shifts away from fossil fuels. Critics, including the German Automotive Industry Association (VDA) and manufacturers like BMW, contend the ban constitutes regulatory overreach by preemptively excluding viable technological alternatives that could achieve comparable CO2 reductions without over-reliance on battery supply chains dominated by China. In June 2025, the VDA proposed revising the target to a 90% CO2 reduction by 2035, permitting up to 10% of new vehicles to use synthetic e-fuels or hydrogen-derived fuels in ICEs, arguing this maintains competitiveness while allowing innovation in carbon-neutral drop-in fuels produced via renewable-powered electrolysis. E-fuels, as demonstrated in pilot projects by Porsche, enable existing ICE infrastructure to run with near-zero net CO2 if production scales, potentially decarbonizing heavier vehicles unsuitable for batteries. Hydrogen internal combustion engines and fuel cells are explicitly permitted under the regulation as zero-emission options, yet critics note mandates favor BEVs, sidelining hydrogen's potential for long-haul transport where battery weight limits range. Empirical analyses highlight uncertainties in electrification's superiority; an EY study from February 2025 found that remanufactured components—reusing engines and transmissions—could yield lower lifecycle CO2 than BEVs by minimizing extraction emissions, which account for 40-50% of EV production impacts. Advanced technologies, including higher thermal efficiencies exceeding 40% in prototypes, combined with biofuels or e-fuels, have demonstrated real-world CO2 cuts in testing comparable to early BEVs, though scaled deployment lags due to barriers. Detractors of mandates point to grid constraints— electricity demand could double by 2035—and mineral shortages as risks amplifying costs without guaranteed emissions gains, advocating first-principles evaluation of diverse pathways over prescriptive electrification. European automakers warn that the ban exacerbates disparities, with BEVs 20-30% pricier to produce, potentially ceding to non- competitors pursuing hybrid or alternative strategies.

Global Context and Comparisons

Adoption and Influence Beyond Europe

Numerous non-European countries have incorporated Euro emission standards or equivalents into their national regulations, primarily to facilitate trade with the , access advanced emission control technologies, and address local air quality challenges. This adoption is particularly prevalent in emerging markets where regulatory frameworks are often developed in alignment with European norms rather than U.S. or Japanese standards, enabling manufacturers to produce vehicles compliant with multiple markets using similar engineering solutions. For heavy-duty vehicles, nations such as , , , , and have implemented standards equivalent to or based on , with 's China VI norms for heavy-duty engines taking effect in 2020. In Asia, India's Bharat Stage VI (BS-VI) standards for light- and heavy-duty vehicles, harmonized with VI limits for pollutants like and particulate matter, were enforced nationwide from April 1, 2020, skipping intermediate stages to expedite pollution reductions in densely populated urban areas. Similarly, and have adopted 5 standards for vehicles and fuels, while plans to implement 5 by 2027, reflecting a regional trend toward progressively stricter norms tied to low-sulfur fuel availability. In , has moved toward VI for heavy-duty engines, positioning it as one of the last major automotive markets to align with this level, with implementation targeted to reduce and other emissions by leveraging existing Euro-compliant technologies. and , in but outside the EU, have adopted earlier Euro stages for heavy-duty vehicles, such as Euro IV and V, contributing to incremental emission declines. The influence extends to fuel quality harmonization, with over 85% of global now meeting Euro VI specifications as of 2023, easing the deployment of advanced aftertreatment systems like in adopting countries. This global patterning on standards, observed in more than 100 nations with emission rules at IV or higher equivalents, stems from the UN Economic Commission for Europe's (UNECE) regulatory framework, under which norms originated, promoting worldwide consistency without mandating full equivalence. However, adoption rates vary by economic capacity, with lower-income regions often lagging at III or IV levels due to infrastructure constraints, though international aid and pressures continue to drive upgrades.

Contrasts with US, China, and Other Standards

European emission standards diverge from U.S. Environmental Protection Agency (EPA) regulations primarily in testing methodologies, pollutant focus, and enforcement mechanisms. The EU's standards utilize the Worldwide Harmonized Vehicles Test Procedure (WLTP), adopted in 2017 for lab testing, alongside Real Driving Emissions (RDE) protocols introduced from September 2017 to capture on-road performance with conformity factors initially set at 2.1 for and later tightened to 1.43 by 2021. In comparison, U.S. Tier 3 standards, phased in for model years 2017–2025, rely on the Federal Test Procedure (FTP-75) for urban cycles and Highway Fuel Economy Test (HFET), emphasizing fleet-average compliance for combined NMOG + at 0.03 g/mile (approximately 0.019 g/km), which surpasses 6's diesel limit of 0.08 g/km in effective stringency when accounting for U.S. certification on low-sulfur fuel and 150,000-mile durability. U.S. standards impose tighter particulate matter (PM) limits at 0.003 g/mile (about 0.0019 g/km) for light-duty diesels under Tier 3, versus 6's 0.0045 g/km, and include comprehensive evaporative and refueling emission controls absent or less rigorous in early phases. regulations historically targeted diesel and PM more aggressively through stage-wise progressions (e.g., Euro 1 in 1992 to Euro 6 in 2014), but real-world compliance gaps exposed by Dieselgate in 2015 prompted RDE additions, whereas U.S. in-use surveillance via programs like the Manufacturers' Advisory Correspondence enforces ongoing accountability. Data from 2021 analyses show U.S. light-duty vehicles achieving emissions equivalent to EU levels from 14 years prior, reflecting stricter U.S. fuel quality mandates (ultra-low sulfur diesel since 2006) and aftertreatment durability.
PollutantEuro 6 (Diesel LD, g/km)US Tier 3 (LD, g/mile)Notes
NOx0.080.03 (NMOG + NOx)U.S. combined limit; Euro applies to diesels specifically. Conversions approximate.
PM0.00450.003U.S. PM includes sub-23 nm; Euro PN limit 6×10^11/km.
China's national standards (China 1–6) closely mirror Euro phases but incorporate local adaptations, with China VI (implemented July 2020 for light-duty) setting diesel NOx at 0.05 g/km—33% tighter than Euro 6's 0.08 g/km—and applying particle number (PN) limits to all fuels, unlike Euro 6's exemption until Euro 6d. China 6b variant, rolled out in major cities from 2023, further reduces by up to 40% over base China VI through enhanced RDE testing with colder-start provisions (-7°C), diverging from Euro 7 proposals by prioritizing (NH3) and non-methane hydrocarbons alongside traditional pollutants. While standards emphasize CO2 fleet targets (95 g/km average since 2020), China's integrate fuel consumption caps (e.g., 5.0 L/100 km for 2025 passenger cars), yielding hybrid regulatory strings but with enforcement challenges from variable provincial implementation. In other regions, Japan's Post New Long-Term standards (2009 onward) align closely with 4–6 equivalents, featuring limits of 0.08 g/km for diesels and advanced PN controls since 2016, often exceeding stringency in urban cycles. India's Bharat Stage VI (BS-VI, enforced April 2020) adopts VI limits directly for (0.08 g/km diesel) and PM but lags in RDE adoption until 2023 pilots. Brazil's Proconve P8 (2022 for light-duty) emulates 6 with identical /PM thresholds, though without full PN or RDE, reflecting export-driven harmonization amid developing-market fuel quality constraints. These contrasts highlight Europe's influence via adoption in and , yet U.S. and Chinese frameworks demonstrate greater integration of real-world testing and fuel-neutral criteria for sustained reductions.

Export of EU Standards and Trade Implications

The European Union's vehicle emission standards, particularly the series, exert influence beyond its borders through requirements for , compelling non- manufacturers to adopt compliant technologies to export vehicles or components to the market. This "EU effect," analogous to the but on a global scale, leads manufacturers to produce vehicles meeting Euro norms for the substantial market, which then facilitates the diffusion of these standards to other regions via and shared production platforms. Empirical analysis indicates that and U.S. standards have collectively reduced global road particulate matter (PM2.5) emissions by over 60%, demonstrating the extraterritorial environmental impact of regulatory stringency. Trade implications arise primarily from the non-tariff barriers posed by requirements, where imported must undergo type approval under standards (e.g., 6 for light-duty since September 2014, escalating to 7 from 2025), increasing compliance costs for foreign producers lacking equivalent domestic regulations. For instance, manufacturers from countries with laxer standards, such as certain Asian or African exporters, face elevated R&D and retrofitting expenses—potentially thousands of per —to meet limits on , PM, and CO2, which can erode profit margins and reduce export volumes to the EU, a market accounting for about 15-20% of global sales. This dynamic disadvantages non-compliant exporters while bolstering EU domestic producers, though it may contribute to higher prices across the board due to limited competition. Conversely, manufacturers have been criticized for exporting older, higher-emission heavy-duty vehicles to low-income countries, where only about one-third of 146 importing nations enforce 4-equivalent or stricter standards as of 2024, effectively while leveraging trade to markets with minimal regulatory hurdles. This practice, observed in exports from the , , and , underscores a tension between the 's stringent domestic rules and global trade realities, potentially undermining the "export" of standards in practice. Ongoing trade negotiations, such as the proposed 2025 U.S.- framework for mutual recognition of and emissions standards, could mitigate these barriers by allowing cross-Atlantic sales without full re-homologation, though safety advocates warn of risks from divergent testing protocols.

References

  1. https://dieselnet.com/standards/eu/
  2. https://dieselnet.com/standards/eu/ld.php
  3. https://dieselnet.com/standards/eu/hd.php
  4. https://www.acea.auto/fact/euro-standards/
  5. https://www.consilium.europa.eu/en/press/press-releases/2024/04/12/euro-7-council-adopts-new-rules-on-emission-limits-for-cars-vans-and-trucks/
  6. https://www.eca.europa.eu/lists/ecadocuments/brp_vehicle_emissions/brp_vehicle_emissions_en.pdf
  7. https://theicct.org/wp-content/uploads/2024/03/ID-116-%25E2%2580%2593-Euro-7-standard_final.pdf
  8. https://eur-lex.europa.eu/eli/dir/1970/220/oj/eng
  9. https://theicct.org/sites/default/files/publications/ICCT_Euro6-VI_briefing_jun2016.pdf
  10. https://eur-lex.europa.eu/eli/reg/2024/1257/oj/eng
  11. https://www.interregs.com/articles/spotlight/266/eu-euro-7-emissions-regulation-published
  12. https://www.acea.auto/fact/fact-sheet-euro-7-realistic-or-unrealistic-timings/
  13. https://theicct.org/proposed-euro-7-emission-limits-could-prevent-over-7200-deaths-in-europe-by-2050/
  14. https://climate.ec.europa.eu/eu-action/transport-decarbonisation/road-transport/light-duty-vehicles_en
  15. https://www.sciencedirect.com/science/article/pii/S2666691X22000276
  16. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:12012E/TXT
  17. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:31970L0220
  18. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32007R0715
  19. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:31988L0077
  20. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32018R0858
  21. https://theicct.org/publication/euro-7-emission-standard-ldv-hdv-eu-mar24/
  22. https://alternative-fuels-observatory.ec.europa.eu/general-information/vehicle-types
  23. https://www.transportpolicy.net/standard/eu-motorcycles-emissions/
  24. https://single-market-economy.ec.europa.eu/sectors/automotive-industry/technical-harmonisation/faq-type-approval-vehicles_en
  25. https://eur-lex.europa.eu/EN/legal-content/summary/emissions-from-heavy-duty-vehicles-euro-vi-certification-rules.html
  26. https://www.legislation.gov.uk/eur/2018/1832
  27. https://dieselnet.com/standards/eu/ld_rde.php
  28. https://dieselnet.com/standards/eu/hd_isc.php
  29. https://theicct.org/wp-content/uploads/2022/12/euro6e-type-approval-dec22.pdf
  30. https://www.rac.co.uk/drive/advice/emissions/euro-emissions-standards/
  31. https://www.transportpolicy.net/standard/eu-heavy-duty-emissions/
  32. https://te-cdn.ams3.cdn.digitaloceanspaces.com/files/2021_11_Euro_VII_HD_policy_paper_2021.pdf
  33. https://www.sciencedirect.com/science/article/pii/S1352231019300056
  34. https://www.aecc.eu/legislation/motorcycles-and-mopeds/
  35. https://www.acem.eu/new-euro-5-environmental-standard-for-motorcycles-and-mopeds-to-enter-into-force-in-2020/
  36. https://dieselnet.com/standards/eu/nonroad.php
  37. https://theicct.org/publication/european-stage-v-non-road-emission-standards/
  38. https://ec.europa.eu/newsroom/growth/redirection/item/683574
  39. https://single-market-economy.ec.europa.eu/sectors/automotive-industry/environmental-protection/non-road-mobile-machinery_en
  40. https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32019R0631&from=EN
  41. https://theicct.org/wp-content/uploads/2023/05/eu-co2-standards-cars-vans-may23.pdf
  42. https://www.europarl.europa.eu/news/en/press-room/20250502IPR28225/co2-emissions-ep-adopts-flexibility-measures-for-carmakers
  43. https://ec.europa.eu/commission/presscorner/detail/en/qanda_24_2527
  44. https://www.acea.auto/fact/fact-sheet-co2-standards-for-heavy-duty-vehicles/
  45. https://theicct.org/publication/revised-co2-standards-hdvs-eu-may24/
  46. https://theicct.org/publication/co2-targets-for-new-hdvs-in-europe-sept25/
  47. https://www.iigcc.org/insights/policy-briefing-eu-co2-emission-performance-standards-for-new-passenger-cars-and-vans
  48. https://climate.ec.europa.eu/eu-action/climate-strategies-targets/2030-climate-targets_en
  49. https://climate.ec.europa.eu/eu-action/transport-decarbonisation_en
  50. https://theicct.org/sites/default/files/publications/fit-for-55-review-eu-sept21.pdf
  51. https://earth.org/eu-review-of-2035-ban-on-co2-emitting-vehicles-deals-another-blow-to-blocs-decarbonization-efforts/
  52. https://www.reuters.com/business/autos-transportation/eu-propose-giving-automakers-three-years-meet-co2-emission-targets-2025-03-03/
  53. https://www.europarl.europa.eu/topics/en/article/20221019STO44572/eu-ban-on-sale-of-new-petrol-and-diesel-cars-from-2035-explained
  54. https://te-cdn.ams3.cdn.digitaloceanspaces.com/files/2023_10_Epetrol_briefing-1.pdf
  55. https://theicct.org/e-fuels-eu-co2-standards-jun22/
  56. https://www.reuters.com/sustainability/climate-energy/eu-auto-group-pushes-hybrids-e-fuels-co2-emission-goal-review-2025-10-08/
  57. https://www.autoweek.com/news/a68037064/eu-reconsiders-2035-internal-combustion-ban/
  58. https://natlawreview.com/article/eu-launches-call-evidence-revision-combustion-engine-and-vehicle-emissions
  59. https://www.electrive.com/2025/10/22/france-and-spain-hold-the-line-on-2035-combustion-phase-out/
  60. https://www.dw.com/en/eu-to-fast-track-review-of-2035-fuel-engine-phase-out/a-73982027
  61. https://www.transportpolicy.net/standard/eu-light-duty-emissions/
  62. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32017R1151
  63. https://dieselnet.com/standards/cycles/wltp.php
  64. https://pmc.ncbi.nlm.nih.gov/articles/PMC9231554/
  65. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32011R0582
  66. https://www.transportenvironment.org/articles/cycle-beating-and-eu-test-cycle-cars-te-9803
  67. https://theicct.org/publication/road-tested-comparative-overview-of-real-world-versus-type-approval-nox-and-co2-emissions-from-diesel-cars-in-europe/
  68. https://www.theguardian.com/business/2016/apr/21/all-top-selling-cars-break-emissions-limits-in-real-world-tests
  69. https://theicct.org/wp-content/uploads/2022/01/TRUE-Brussels-nov2021_facts-6d-TEMP_EN.pdf
  70. https://egusphere.copernicus.org/preprints/2025/egusphere-2024-3553/egusphere-2024-3553.pdf
  71. https://www.crownoil.co.uk/guides/euro-6-emissions-standards/
  72. https://publications.jrc.ec.europa.eu/repository/handle/JRC124017
  73. https://www.eea.europa.eu/en/analysis/indicators/emissions-of-air-pollutants-from
  74. https://www.eea.europa.eu/en/analysis/publications/sustainability-of-europes-mobility-systems/air-pollution
  75. https://www.concawe.eu/wp-content/uploads/Rpt_18_8.pdf
  76. https://acp.copernicus.org/articles/25/9113/2025/acp-25-9113-2025.pdf
  77. https://www.eea.europa.eu/publications/europes-air-quality-status-2024
  78. https://www.eea.europa.eu/en/analysis/publications/harm-to-human-health-from-air-pollution-2024
  79. https://theicct.org/publications/health-impacts-transport-emissions-2010-2015
  80. https://doi.org/10.1016/S0140-6736(20)30752-2
  81. https://pubmed.ncbi.nlm.nih.gov/28442773/
  82. https://energyandcleanair.org/wp/wp-content/uploads/2025/05/CREA_HIA_Diesel_Defeat-devices_EU_UK_EN_2025.pdf
  83. https://pmc.ncbi.nlm.nih.gov/articles/PMC7252081/
  84. https://theicct.org/sites/default/files/publications/eu-euro7-standards-health-benefits-jun21.pdf
  85. https://pubs.acs.org/doi/10.1021/acs.est.2c01072
  86. https://www.thelancet.com/journals/lanpub/article/PIIS2468-2667%2823%2900120-2/fulltext
  87. https://climate.ec.europa.eu/system/files/2016-11/evaluation_ldv_co2_regs_en.pdf
  88. https://theicct.org/wp-content/uploads/2021/06/ICCT_real-world-NOX-RDE-2015-2030_dec2016.pdf
  89. https://uk-air.defra.gov.uk/assets/documents/reports/cat09/1403040928_chapter4.pdf
  90. https://www.eea.europa.eu/en/analysis/maps-and-charts/comparison-of-nox-emission-standards
  91. https://pmc.ncbi.nlm.nih.gov/articles/PMC5876343/
  92. https://theicct.org/publication/euro7-premature-deaths-sep23/
  93. https://iopscience.iop.org/article/10.1088/1748-9326/aa5987
  94. https://academic.oup.com/qje/article/138/3/1907/7080183
  95. https://ceepr.mit.edu/wp-content/uploads/2021/09/2020-014.pdf
  96. https://www.frontier-economics.com/media/piugmdqt/frontier-report-regulatory-costs-of-euro-7.pdf
  97. https://www.frontier-economics.com/uk/en/news-and-insights/news/news-article-i10318-regulatory-costs-of-euro-7-matter/
  98. https://www.acea.auto/press-release/euro-7-direct-costs-4-to-10-times-higher-than-european-commission-estimates-new-study-reveals/
  99. https://www.acea.auto/news/penalty-relief-for-2025-for-cars-and-vans-why-it-matters-and-whats-at-stake/
  100. https://www.spglobal.com/mobility/en/Info/1220/co2-compliance-investments.html
  101. https://climate.ec.europa.eu/system/files/2016-11/report_effect_2011_en.pdf
  102. https://www.ecb.europa.eu/press/economic-bulletin/focus/2022/html/ecb.ebbox202207_02~5bde8eeff0.en.html
  103. https://www.acea.auto/fact/fact-sheet-euro-7-cheap-or-expensive/
  104. https://cepr.org/voxeu/columns/welfare-impact-emission-standards-eu-automobile-market
  105. https://www.reuters.com/business/autos-transportation/europes-carmakers-discount-evs-hike-petrol-car-prices-new-emissions-rules-loom-2024-12-17/
  106. https://www.cer.eu/publications/archive/policy-brief/2025/how-buy-european-rules-can-help-save-europes-car-industry
  107. https://www.consilium.europa.eu/en/infographics/fit-for-55-emissions-cars-and-vans/
  108. https://www.reuters.com/sustainability/climate-energy/automakers-pool-with-ev-makers-avoid-eu-emissions-fines-2025-10-21/
  109. https://www.nytimes.com/2025/10/09/business/germany-auto-industry-emissions-rules.html
  110. https://www.eurofound.europa.eu/en/publications/all/employment-eus-automotive-sector
  111. https://www.delorscentre.eu/en/publications/detail/publication/europes-car-industry-in-transition
  112. https://transport.ec.europa.eu/document/download/89b3143e-09b6-4ae6-a826-932b90ed0816_en
  113. https://www.mckinsey.com/industries/automotive-and-assembly/our-insights/european-automotive-industry-what-it-takes-to-regain-competitiveness
  114. https://www.ecb.europa.eu/pub/pdf/scpwps/ecb.wp2820~40f84bea89.en.pdf
  115. https://www.sciencedirect.com/science/article/abs/pii/S009506962400069X
  116. https://www.econstor.eu/bitstream/10419/303383/1/LEQS-P100.pdf
  117. https://www.acea.auto/fact/fact-sheet-euro-7-good-or-bad-for-industry-competitiveness/
  118. https://autovista24.autovistagroup.com/news/how-have-euro7-emission-standards-changed/
  119. https://www.acea.auto/publication/aeris-air-quality-report-euro-7-cost-benefit-assessment/
  120. https://www.bbc.com/news/business-34324772
  121. https://www.cleanenergywire.org/factsheets/dieselgate-timeline-car-emissions-fraud-scandal-germany
  122. https://www.sciencedirect.com/science/article/pii/S0363811122000017
  123. https://www.transportenvironment.org/articles/national-regulators-heart-dieselgate-european-parliament-investigation
  124. https://rgaonline.it/articoli/eu-dieselgate-unveiling-the-weirdness-of-the-eus-attitude-to-compliance-on-environmental-matters/
  125. https://www.sciencedirect.com/science/article/abs/pii/S0048969719306321
  126. https://www.transportenvironment.org/articles/10-years-after-dieselgate-the-car-industry-is-paving-the-way-for-another-emissions-scandal
  127. https://theicct.org/ten-years-after-dieselgate-transportations-unfinished-business-sept25/
  128. https://www.euroconsumers.org/dieselgate-the-long-and-winding-road-to-consumer-compensation/
  129. https://www.beuc.eu/sites/default/files/publications/beuc-x-2019-050_report_-_four_years_after_the_dieselgate_scandal.pdf
  130. https://theicct.org/pr-electric-cars-getting-cleaner-faster/
  131. https://www.carbonbrief.org/factcheck-21-misleading-myths-about-electric-vehicles/
  132. https://www.reuters.com/business/autos-transportation/bmw-ceo-says-europe-must-cancel-ban-petrol-engines-reduce-reliance-china-2024-10-15/
  133. https://www.cleanenergywire.org/news/german-car-industry-calls-reversal-eu-2035-combustion-engine-ban
  134. https://www.politico.eu/article/german-auto-lobby-proposal-sparks-renewed-debate-eu-combustion-engine-ban/
  135. https://www.spglobal.com/commodity-insights/en/news-research/latest-news/crude-oil/031023-german-block-on-eus-ice-car-ban-throws-spotlight-on-controversial-e-fuels
  136. https://www.oeko.de/en/news/latest-news/faqs-on-the-phase-out-of-combustion-engines-in-2035-and-electric-mobility/
  137. https://www.ey.com/en_jp/insights/consulting/estimates-reveal-usefulness-of-remanufacturing
  138. https://www.sciencedirect.com/science/article/pii/S0301421524000429
  139. https://advancedbiofuelsusa.info/european-automakers-warn-that-combustion-engine-ban-isn-t-possible
  140. https://www.forbes.com/sites/neilwinton/2025/03/06/europe-eases-co2-rules-but-pressure-rises-to-end-2035-ev-monopoly/
  141. https://19january2017snapshot.epa.gov/www3/airquality/blackcarbon/2012report/Appendix6.pdf
  142. https://theicct.org/left-in-the-dust-brazil-might-be-the-last-major-automotive-market-to-adopt-euro-vi-standards/
  143. https://www.ccacoalition.org/news/harmonizing-standards-cleaner-transport-worldwide
  144. https://www.ccacoalition.org/news/euro-vi-and-beyond-what-next-mission-eliminate-transport-sector-pollutants
  145. https://www.ccacoalition.org/sites/default/files/resources/files/ACCELERATING%2520THE%2520GLOBAL%2520SHIFT%2520TO%2520A%2520CLEANER%2520ON-ROAD%2520DIESEL%2520FLEET%2520-%2520V1.3.pdf
  146. https://theicct.org/sites/default/files/ICCT_comparison%2520Euro%2520v%2520US.pdf
  147. https://www.transportpolicy.net/standard/us-light-duty-emissions/
  148. https://trueinitiative.org/insights/guest-blog-comparing-us-and-eu-ldv-emissions/
  149. https://dieselnet.com/standards/cn/ld.php
  150. https://theicct.org/wp-content/uploads/2021/06/China-LDV-Stage-6_Policy-Update_ICCT_20032017_vF_corrected.pdf
  151. https://www.corning.com/worldwide/en/products/environmental-technologies/emissions-control/emissions-regulations.html
  152. https://www.sciencedirect.com/science/article/abs/pii/S0301479716307319
  153. https://publications.jrc.ec.europa.eu/repository/handle/JRC104379
  154. https://healthpolicy-watch.news/european-union-japan-and-south-korea-exporting-heavy-duty-vehicle-pollution-to-low-income-countries/
  155. https://www.roadandtrack.com/news/a65888856/us-europe-share-safety-emissions-standards/
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