The first step is to find out if the city you wish to visit has a low emission zone, and what emissions standard it has. This can best be done by our Quick Guide, or our map. For more details on using our website see how to best use this site.
Then find out the emissions standard of the vehicle you wish to use.
For some low emission zones retrofitting with a diesel particulate filter or Selective Catalytic Reduction (SCR) is possible so that your vehicle meets the standard.
If you travel to many cities in Europe, check what emissions standards are required in the different LEZs, so that you choose a vehicle that will allow you to drive into the cities you need. Our Quick Guide may be helpful for you.
If your vehicle does not meet the standards required, then you need to do one or more of the following:
Use a newer vehicle with an engine which meets the LEZ emissions standards, either a new vehicle, or a newer vehicle that meets the standards.
Vehicles in Europe since 1992 have been built to "Euro standards". These means that every 4-6 years, new vehicles are built with cleaner standards. The standards are currently between "pre-Euro" or "Euro 0" (meaning before the standards), and Euro standards 1 to 6. There are a number of other emissions standards, such as "EEV, Environmentally Enhanced Vehicle". The "Euro standards" are sometimes referred to as Euro I to VI for heavy duty vehicles, and Euro 1 to 5 for light duty vehicles. On this website we call them Euro 1 to 6 for both heavy and light duty vehicles to make it simpler.
If you have a choice, select the cleanest engine of the highest Euro standard, as this will also meet future LEZ standards. The Emissions Analytics EQUA Air Quality Index allows you to identify the vehicle with the lowest fuel use, CO2, or nitrogen oxides (NOx) emissions in actual road conditions.
For most LEZs and many vehicles, it is possible to fit equipment to reduce its emissions or modify the vehicle to reduce its emissions.
Possible modifications include:
The LEZ will usually require proof that a certified particulate filter has been fitted.