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INTRODUCING

WORLDWIDE HARMONIZED LIGHT VEHICLE TEST PROCEDURE (WLTP)

The new test method for fuel economy and emissions.

Since the 1980s, European new car emissions and fuel economy tests have been carried out using the New European Driving Cycle (NEDC). From 1 September 2017, a new test was introduced, the Worldwide Harmonized Light Vehicles Test Procedure (WLTP), to give both car buyers and owners a more realistic understanding of a car's performance.


  

  
    lexus wltp section nedc to wltp

NEDC TO WLTP: WHAT’S CHANGING?

With advances in vehicle technology and changes in driving conditions, the near-40-year-old NEDC driving cycle test has been replaced. To give you a more accurate way of calculating and comparing a car’s fuel consumption and emissions, the new WLTP test introduces more realistic testing conditions, so that lab measurements better reflect the on-road performance of a car.

HERE’S WHAT TO EXPECT FROM THE WLTP TESTS:

Test Cycle

Dynamic tests which are more representative of real-driving behaviour.

Cycle Time

Test lasts 30 minutes, an increase of 10 minutes.

Driving Phases

More dynamic phases: 52% urban and 48% non-urban.

Cycle Distance

23.25 kilometres long, over twice the old distance.

Average & Maximum Speeds

Average speed is 46.5km/h (an increase of 12.5km/h) while top speed is raised to 131km/h.

Optional Equipment

Additional vehicle options (impacting CO2 and consumption) are taken into account.

Gear Shifts

Each vehicle has different, rather than fixed, gear shift points.

Test Temperatures

Measurements now taken at 23°C (and CO2 values corrected to 14°C) vs 20-30 °C.

WHAT DOES WLTP MEAN FOR ME?

WLTP will facilitate a better means of assessing how high the fuel consumption and CO2 emissions of the vehicle may be on average. At the same time, however, more realistic values will also mean higher consumption and CO2 values for vehicles with combustion engines and a lower electric range for electric vehicles (including plug-in hybrids). These new tests will not have any effect or change the performance of the vehicle.
As Lexus transition to WLTP the following type approval timings will apply:

Commercial and Passenger vehicles (types M1 and N1 (i)):

  • From September 2017, all new model introductions are subject to WLTP type approval and Real Driving Emissions (RDE) testing.
  • From September 2018, all new registrations need to comply to WLTP type approval.
  • From September 2019, all new registrations need to comply to Real Driving Emissions (RDE) testing.

INTRODUCING GREATER CLARITY

At Lexus, we welcome the change to WLTP, which will provide our customers with a more accurate basis for calculating fuel economy and emissions. As a leader in clean mobility, we have spent decades researching how to make vehicles that are kinder to the environment, producing technologies such as hybrid that have proved their value in reducing greenhouse gas emissions, and helping the move towards a low carbon society.

Figures are provided for comparability purposes; only compare fuel consumption and CO2 figures with other cars tested to the same technical procedures.  These figures may not reflect real life driving results.  Fuel consumption and CO2 produced varies significantly depending on a number of factors, including the accessories fitted (post-registration), driving style, conditions, speed and vehicle load. 

  All models and grades are certified according to the World Harmonised Light Vehicle Test Procedure (WLTP).  All mpg and CO2 figures quoted are full WLTP figures. 

The official CO2 figures for vehicles changed as from 1st April 2020, due to a change in the official method of calculation. CO2 figures are used in the calculation of Vehicle Excise Duty (car tax) for new cars during their first year of registration. As a result, all CO2 figures, car tax and 'on the road' prices for new vehicles, which were provided or displayed prior to 1st April 2020, may now have changed for vehicles which were not registered before that date. These dates may change, please visit www.vehicle-certification-agency.gov.uk/fcb/wltp.aspfor the latest information.  

Please consult contact your local Lexus Centre for further information.

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    “HYBRID IS THE BACKBONE OF OUR POWERTRAIN PROGRAMME AND WILL HELP US CUT OUR VEHICLE CARBON EMISSIONS BY 90% BY 2050 COMPARED TO 2010.”

    Dr. Johan Van Zyl, President and CEO of Toyota Motor Europe

  

  
    lexus wltp section everyday tests

EVERYDAY TESTS, REALISTIC RESULTS

The new WLTP tests will ensure that lab measurements now better reflect the situations you will experience in everyday life. This means that fuel consumption and emissions values displayed for new cars are a far better representation of what you are actually likely to achieve.

STILL HAVE QUESTIONS?

  • Will my car’s real-world fuel consumption change?

    No, your actual fuel consumption will remain the same, but it’s likely that your vehicle will get a higher official CO2 value and fuel consumption values due to the more rigorous WLTP test cycle – closer to what you observe.

  • Why has the NEDC value of my car suddenly increased?

    For a transitional period of time (until the 6th April 2020), NEDC values will still be generated in parallel to WLTP values. As the old NEDC procedure can no longer be used, regulations mandate that WLTP CO2 values will be translated back to NEDC-equivalent values by means of a ‘correlation exercise’. This will be carried out using either a simulation tool developed by the European Commission or through physical re-testing, which may result in higher NEDC CO2 values for your car as this will be an updated version of NEDC (based on WLTP).

  • What impact will this have on taxation?

    NEDC CO2 values will be used for taxation purposes during the 2017/2018 tax-year, and will continue to be until further notice from HMRC. Change to: NEDC CO2 values will be used for taxation purposes until 5th April 2020. From the 6th April 2020 WLTP CO2 figures will be used for taxation purposes.