The transition to the WLTP lab test for cars (Worldwide Harmonised Light Vehicle Test Procedure) will follow this timeline:
Transition Timeline: From NEDC to WLTP
- Cars type approved using NEDC before September 2017 can still be sold.
- WLTP type approval testing will be introduced for new car types.
- Some cars will have ‘old’ NEDC values, while others will already be certified under the new WLTP conditions.
- The industry would like to start using WLTP-based results for general consumer information (eg sales brochures and websites).
- During the period of transition (up until the end of 2018), only NEDC values should be used on labels and information in dealerships to enable consumers to compare different cars.
- It is expected that national tax regulations will continue to be based on NEDC values.
- All new cars must be certified according to the WLTP test procedure, and no longer on NEDC.
- An exception should be made for end-of-series vehicles to allow for a limited number of unsold vehicles in stock that were approved under the old NEDC test to be sold for one more year.
- All cars in dealerships should have WLTP-CO2 values only to avoid any confusion among consumers, in the view of the automobile industry.
- National governments should adjust vehicle taxation and fiscal incentives to WLTP values, respecting the principle that WLTP should not have a negative impact on consumers.