Are you driving a clean diesel car?

In the Autumn Budget 2017, the Chancellor announced plans for the new tax supplement for diesel cars not certified to the RDE2?standard?(also known as EURO 6D). These came into force on 6 April 2018 and equate to a rise from 3% to 4%. For the average diesel on sale this means an increase of around ?40 – pushing it up from ?165 to ?205. RDE2 is a much stricter standard emissions standard than previous ones, and there are currently no (or possibly very few) diesel cars on the road that will meet it. This therefore means the majority of diesel drivers will have to pay the higher tax.?However, the changes do not affect vans.

Cars certified as meeting the Real Driving Emissions 2 (RDE2) standard under Annex IIIA of Commission Regulation (EU) 2017/1151 will be exempt from the diesel supplement.?If, unusually, drivers do obtain an?RDE2/Euro 6d?certificate for their car, you should report it as if it is a petrol car using fuel type ?A?. You should also enter the equivalent emissions percentage on the?P11D. For cars that are being payrolled,?enter ?A? in Box 177 of the FPS and the type ?A? appropriate percentage in Box 182.

So does my car conform to the RDE2 standard?

The RDE test was introduced on 1 September 2017 to include a real-world component to the?laboratory based Worldwide Harmonised Light Vehicles Test Procedure (WLTP). To allow time to adapt to the new requirements, compliance thresholds will be reduced in stages as follows:

  • To comply with the requirements of RDE Step 1 a car?s real-world NOx emissions must not exceed 210% of the Euro 6 emissions standard.
  • RDE Step 2 tightens this NOx conformity factor to 150% from January 2020.


What is the RDE (Real Driving Emissions) test?