Visitors renting a car in France often discover the Crit'Air sticker only when they see the road signs. It is a legal requirement in several cities, and driving without one where it applies can result in a fine.
What the sticker actually is
Crit'Air is an air quality certificate: a coloured disc displayed on the windscreen that classifies the vehicle by how much it pollutes. Categories run from Crit'Air 0 for fully electric vehicles through to Crit'Air 5 for the oldest diesels, based on the engine type and the date of first registration.
The classification is fixed by the vehicle itself. It has nothing to do with the size of the car, its rental category or its price, which surprises drivers who assume a newer premium model is automatically in a better class than a small city car.
Where it is required
The sticker matters inside low emission zones, known in French as ZFE. Several metropolitan areas operate one, including the Greater Paris area, and each sets its own rules on which categories may enter and at what times.
Two points deserve attention. First, the rules differ from one city to another and change over time, so a category allowed in one place may be excluded in another. Second, separate restrictions apply during pollution peaks, when access is temporarily limited to the cleanest categories. Signs at the zone boundary state the current rules, and they are worth reading before entering, along with the general advice on our driving in Paris page.
Who is responsible on a rental car
Vehicles from French rental fleets are usually recent and already carry the sticker, since the company registers the car and orders the certificate. In practice you are unlikely to be handed a car without one.
It still takes ten seconds to check the windscreen at pickup, whether you collect the car at one of the Paris airports or in the city. If the disc is missing, say so before leaving the desk rather than after, exactly as you would for existing damage or a fuel level that does not match the contract.
Drivers who would rather avoid the question altogether can look at an electric rental, which falls into the least restricted category everywhere.
Rules on low emission zones are set locally and change regularly. Check the official French government information for the current position before travelling.
