The introduction of the new lab test for cars, known as the Worldwide Harmonised Light Vehicle Test Procedure (WLTP), will happen according to the following steps.

When will the WLTP changes take place?

The transition to WLTP will happen in phases:

  • WLTP will officially apply to new types of cars from September 2017. New types of cars are vehicle models that are introduced on the market for the first time.
  • Manufacturers may already start requesting WLTP approvals for new car types when the legislation comes into force in the European Union (no sooner than end July 2017).
  • WLTP will apply to all new car registrations from September 2018.
  • EU measures for end-of-series cars should allow for a limited number of unsold vehicles in stock that were approved under the old test (NEDC) to be sold the following year, that is until September 2019.

From NEDC to WLTP: What will change?

What are the benefits of WLTP?

How to ensure a smooth transition to WLTP?

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.

The same car suddenly has two different CO2 values, why is this?

The NEDC value of a car suddenly increased, what happened?

  • 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.

Will my fuel consumption increase under WLTP?

  • 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.

Will WLTP affect how much car tax I pay?

The same car suddenly has two different CO2 values, why is this?

  • The European Commission will convert today’s (NEDC-based) CO2 targets to specific WLTP-CO2 targets of comparable stringency. These new WLTP targets will apply for monitoring car fleet compliance.

Will the new WLTP test affect CO2 targets?

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