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European emission standardCzechia

An introduction to the traffic rules and road signs of Czechia. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.

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77. European emission standard

A European emission standard, commonly called a Euro standard, is a European vehicle classification based on limits for pollutants emitted by vehicles and their engines. Successive standards, such as Euro 4, Euro 5 and Euro 6, introduced progressively stricter requirements for pollutants such as nitrogen oxides, particulate matter, carbon monoxide and hydrocarbons.

A vehicle's Euro standard is determined as part of its type approval and depends on factors including the vehicle category, fuel type and applicable emissions legislation when it was approved. Euro standards may also be used by authorities to determine access to low-emission zones, but local access rules vary between countries and cities.

European emission standard
Chart comparing European exhaust-emission standards for diesel cars.
Wikimedia.org • Rfeba • CC0
What is a European emission standard?

A European emission standard, or Euro standard, classifies vehicles according to the emissions requirements they had to satisfy when approved for use in the European market.

🔗 legislation.gov.uk • Regulation (EC) 715/2007, Annex I, Euro 5/6 tables (UK official legislation copy)

🔗 consilium.europa.eu • Council of the EU, Euro 7 adoption explanation, 12 April 2024

What do Euro 4, Euro 5 and Euro 6 mean?

Euro 4, Euro 5 and Euro 6 identify successive stages of European vehicle-pollutant requirements. The applicable limits depend on the vehicle, engine and pollutant, so a higher number does not mean that every individual numerical limit changed. Later stages can also alter testing and durability requirements.

🔗 legislation.gov.uk • Regulation (EC) 715/2007, Annex I, Euro 5/6 tables (UK official legislation copy)

🔗 consilium.europa.eu • Council of the EU, Euro 7 adoption explanation, 12 April 2024

Can petrol and diesel vehicles with the same Euro number have different emission limits?

Yes. The applicable emission limits and testing requirements can differ according to the vehicle category, engine and fuel type even when vehicles belong to the same general Euro generation.

🔗 legislation.gov.uk • Regulation (EC) 715/2007, Annex I, Euro 5/6 tables (UK official legislation copy)

🔗 consilium.europa.eu • Council of the EU, Euro 7 adoption explanation, 12 April 2024

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