So let’s take a look at the most important bulbs for your visibility. First, there are the low beams, which, according to French law, must illuminate the road at least 30 meters ahead. Then there are high beams, which must illuminate the road at least 100 meters ahead! And finally, let’s talk about front fog lamps.
There are several different bulb references. The most common are H1, H4, H7 and H11. Which is the right bulb for your headlight? To find out, you need to take your maintenance booklet or look in your headlight unit and refer to what it says. Be careful, these types of bulbs are not interchangeable!

However, there are a few clues that can help you.
First, if your headlamp has only one bulb slot, it’s most likely an H4. H4s have 2 filaments. One for high beam and one for low beam. But the two are never on at the same time, they alternate.

Then, if you have 2 slots per headlamp, this means you need to install either H7s for high and low beams, H1s for both, or a combination of H1s and H7s.

As for H11 bulbs, these are most often used for low beam, but also for front fog lights.

Ultimate solution: you can look directly on the Internet, for example on the Philips website. It’s easy to enter