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 has been introduced, the Worldwide Harmonized Light Vehicle Test Procedure (WLTP), to give both car buyers and owners a more realistic understanding of a car's performance.
Dr. Johan van Zyl, President and CEO of Toyota Motor Europe
A. 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.
A. Like NEDC, WLTP continues to be a laboratory test. As driving styles and conditions vary, some variance between official values and what a consumer achieves is possible.
A. For a transitional period of time (until the end of 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).
A. Yes, WLTP is also used to measure substances such as carbon monoxide (CO), hydrocarbons (HC) and oxides of nitrogen (NOx) and particles (PM/PN).
A. WLTP certification will be mandatory for all light commercial vehicles (Categories N1 (ii), N1 (iii) and N2) from 1 September 2019, one year after passenger cars.
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