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WLTP - The new Test Procedure

WLTP - The new Test Procedure

A New Standard

The automotive industry is facing a major transformation process: the WLTP (Worldwide Harmonized Light-Duty Vehicles Test Procedure) has replaced the existing NEDC for all passenger cars and light commercial vehicles as a new, more realistic and more consistent test procedure for determining fuel consumption and emissions. It will comes into force gradually from September 1, 2017. Volkswagen Group Fleet International presents essential changes for fleet customers.

WLTP Basic Information



What is the WLTP?

The WLTP is a test procedure to simulate more realistic driving profiles and is legally binding for all manufacturers.

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Where will the WLTP be introduced?

Primarily the WLTP will be introduced in the EU-28 countries, Norway, Iceland, Switzerland and Liechtenstein.

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When will the WLTP be implemented?

From autumn 2017, the WLTP will gradually replace the NEDC. Passenger cars and light commercial vehicles are subject to different deadlines.

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What are the benefits of the WLTP?

For you as a fleet customer, the WLTP means a considerable advantage in comparability and transparency.


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NEDC vs. WLTP

What are the advantages of the WLTP over previous test procedures? Key improvements to the new test can be illustrated by comparing it to the NEDC, for example, which has been applied in the EU since 1997. Both methods involve placing the vehicle on a dynamometer under laboratory conditions – but the boundary conditions and specifications for the WLTP are stricter and more realistic. The new test procedure consists primarily of two main components:


Test Cycle

The WLTC (the accompanying test cycle as part of the overall procedure) is characterised by more realistic driving profiles. As a result, top and average speeds are higher, the testing period is longer and the driving profiles are more dynamic.

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Test Procedure

Among other things, the WLTP takes into account the rolling resistance of the configured tyre, special and additional equipment as well as the vehicle’s aerodynamics with its retrofit solutions.

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Frequently Asked Questions

  • To whom is the WLTP relevant?

    The WLTP is a legally binding test procedure that applies to all manufacturers. The new test procedure will account for conventional combustion engines as well as hybrid and electric vehicles.

  • In which countries will the WLTP be introduced?

    The WLTP will be introduced in the EU-28 countries, Norway, Iceland, Switzerland and Liechtenstein as well as Turkey and Israel as countries that follow EU regulations. Outside Europe, Japan will introduce the WLTP in modified form and China will introduce it for emissions. In addition, India and South Korea plan to introduce the WLTP at a later stage.

  • How does the WLTP affect vehicles already registered in my fleet?

    Generally, the shift to the WLTP will not affect vehicles already registered under the NEDC. During its first stage of introduction from September 1, 2017, the WLTP will be relevant only to new model types, while from September 1, 2018, WLTP guidelines will be mandatory for all new registrations. For commercial vehicles outside category N1 class I, introduction will be delayed by one year.

  • What kind of tax implications will the WLTP have for my fleet?

    In tax terms, nothing will change for vehicles that have already been registered. The deciding factor for taxation and the specification of consumption values for the vehicle is the test procedure applied on the date of registration. It is expected that vehicles with type approval under the NEDC will be taxed according to the NEDC (in the interest of vested rights). The adjustment of CO2   taxation lies within the responsibilities of each EU member state and is therefore regulated by national law. As the NEDC is the deciding factor in taxation until at least August 31, 2018 or until national legislation has been adapted, we do not currently see any direct changes to vehicle taxation.

    For Germany, the national authorities have declared, in line with the sixth amendment of the Motor Vehicle Tax Act, that WLTP values will be applied from September 1, 2018 as a basis for taxation. However, as the WLTP will demonstrate higher CO2 values than the NEDC due to more realistic test conditions, an increase in vehicle tax can be assumed if current national taxation thresholds on WLTP values remain unchanged. The modulation on tax thresholds will be investigated by each EU member state.

  • How does the WLTP affect CO2   values?

    It is not possible to quantify the actual impact on CO2   values, partly because there is no conversion formula to WLTP, and also because there is no experience as of yet. In addition, we as a manufacturer may only provide officially approved values. Furthermore, vehicle ranges for electric and hybrid cars are also determined for each individual vehicle.

  • Do I need to adapt my fleet guideline directly to the WLTP?

    Next to actual CO2   emissions of a fleet, vehicle choice and internal company guidelines are often a determining factor in taxation. However, these values are derived from the current NEDC and will remain so until national legislation is fully implemented. Until national laws are ratified and official WLTP values type approved by the governing authorities are available, it is not advisable to adapt fleet policies. Nevertheless, we recommend raising awareness among fleet drivers by communicating WLTP figures voluntarily as additional information from 09/2017 for all new types.

  • When will Volkswagen AG provide WLTP values?

    Publication of WLTP values requires official type approval from the responsible motor vehicle authority beforehand. From September 1, 2017, both NEDC and WLTP values have to be provided in the CoC for all new types approved under the WLTP.

  • When will configurators begin to display WLTP values?

    Volkswagen Group will provide WLTP type approved values for all newly homologated models voluntarily as additional information from September 2017. Until the WLTP is fully implemented in each country or the national law is modified, the NEDC values remain decisive.

  • To what extent will the WLTP influence my vehicle configuration?

    So far the NEDC has been a decisive factor when determining consumption and CO2   values as well as vehicles ranges. In the new WLTP test procedure, measurements are performed while taking into account the equipment weight, vehicle aerodynamics, rims and tyre rolling resistance and engine-gear box combination. That is why vehicles will feature individual CO2   emission and consumption figures. As a result, the consumer will be able to influence both price and CO2   emissions of a configured vehicle in future.

  • Test results will be higher after the WLTP procedure. Does that mean that my fuel consumption has increased?

    The general rule is: individual customer consumption is independent from the test cycle. The aim of the test procedure is to ensure by means of a standardised and reproducible process that different vehicle models and manufacturers can be compared. In reality, a vehicle’s consumption and CO2   emissions depend on a multitude of factors that cannot be perfectly reconstructed in the laboratory, even with the WLTP. Different driving styles represent a key factor here. When two drivers move identical vehicles in identical conditions in real traffic, the values are bound to differ due to individual acceleration and braking behaviour, for example. With the WLTP, CO2   emissions and fuel consumption will likely be higher because the new test procedure simulates a wider range of realistic driving profiles.