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ACEA comments: Auto industry welcomes more stringent emissions tests coming into effect on 1 SeptemberBack

The European Automobile Manufacturers’ Association (ACEA) welcomes the two new tests for measuring emissions from cars and vans coming into force in the EU on 1 September 2017.

The new laboratory test, called WLTP, introduces much more realistic testing conditions for measuring pollutant and CO2 emissions than the previous, outdated lab test (NEDC). It therefore provides a more accurate basis for measuring a vehicle’s fuel consumption and emissions.

An additional new test to measure pollutant emissions on the road – known as the real driving emissions (RDE) test – also comes into effect, making Europe the only region in the world to implement such testing.

Under RDE, a car will be driven on public roads over a wide range of conditions using portable measuring equipment. RDE will complement WLTP to ensure that pollutant emission levels, measured during the laboratory test, are confirmed on the road.

“The automobile industry has invested heavily to achieve significant improvements in emissions from RDE-compliant Euro 6 vehicles,” stated ACEA Secretary General, Erik Jonnaert.

“Indeed, these diesel vehicles will deliver very low pollutant emissions not only in the laboratory, but also on the road. We believe that the introduction of this latest generation of diesel vehicles, supported by fleet renewal plans, will play a strong role in helping cities move towards compliance with EU air quality targets.”

ACEA also welcomes the fact that with RDE there is now one common EU-wide test to measure on-the-road emissions of cars. This should help prevent the confusion caused by using a multitude of different tests, each with varying and incomparable methods and results – such as those recently proposed by some local governments, cities and other stakeholders

Notes for editors

  • As of 1 September, WLTP will apply to all new car types (models that are introduced on the European market for the first time). One year later, in September 2018, WLTP will apply to all new cars registered.
  • RDE step 1 (with a NOx conformity factor of 2.1) applies as of 1 September for new car types. It will apply in September 2019 for all types.
  • RDE step 2 (with a NOx conformity factor of 1.0 plus an error margin of 0.5) applies in January 2020 for new types and then from January 2021 for all types.
  • More information about RDE and WLTP can be found on and

Posted by Sue Robinson on 01/09/2017