Retrofit your vehicle

You may be able to retrofit your vehicle with emissions reduction technology to meet the current LEZ emissions standards and the tougher LEZ emissions standards from 26 October 2020.

Use our new checker to see if your vehicle will be affected by changes to LEZ standards.

However, installing a filter does not guarantee your vehicle will meet these LEZ standards or the ULEZ standards.

Emissions reduction technology

Emissions reduction technologies include:

  • Selective catalytic reduction, which reduces NOx emissions
  • Replacement Euro VI engines
  • Converting a vehicle to electric power

Retrofit technologies need to be approved by the Clean Vehicle Retrofit Accreditation Scheme (CVRAS). This government scheme, funded by Defra, establishes common standards for all Clean Air Zone cities.

CVRAS has certified emissions reduction technologies for many buses, coaches, HGVs, refuse vehicles and most recently, a medium-duty HGV. Retrofits for certain HGV models and for vans over 3.5 tonnes are being developed.

As retrofits need to be calibrated to specific vehicle models, not all vehicles can be covered. We expect more conversions to be available in the future.

Information about the retrofit process and a list of suppliers is on the CVRAS website.

Vehicle operators who have a CVRAS-approved retrofit carried out on their vehicle will need to register with us before driving within the LEZ.

Replace your vehicle

You could upgrade to a newer vehicle that meets the standards or an electric vehicle, Find out more about replacing your vehicle.

Reorganise your fleet

If you operate a fleet of vehicles, you could reorganise it so that only vehicles meeting the emissions standards are driven within the LEZ.

Pay the daily charge

We would prefer that your vehicle meets the LEZ emissions standards. However, if you're not able to take the measures needed, then you can pay the daily charge to drive within the zone.

Find out how to pay a LEZ charge.