1. Open the hood of your Peugeot.
2. Locate the engine bay. This is the area where the engine is located, usually covered by a plastic or metal cover.
3. Look for a black or gray plastic box with the words "air filter" or "filtre à air" written on it. This is the air filter housing.
4. In some Peugeot models, the air filter housing may be located inside a larger plastic cover. You may need to remove this cover to access the air filter housing.
5. Once you've located the air filter housing, you can open it by releasing the clips or screws that hold it in place.
6. Inside the housing, you'll find the air filter. It's usually a rectangular or cylindrical-shaped object made of pleated paper or foam.
If you have trouble locating the air filter in your Peugeot, it's best to consult your vehicle's owner's manual or seek assistance from a qualified mechanic.