Where is the cabin air filter located in a BMW 328i?

[Maureen]

The cabin air filter in a BMW 328i is located inside the glove compartment on the passenger side. To replace the cabin air filter, you will need to remove the glove compartment. Function of the cabin air filter: When driving with the air conditioning on, the car draws in external air into the cabin. However, the air contains various particles such as dust, pollen, soot, abrasive particles, ozone, odors, nitrogen oxides, sulfur dioxide, carbon dioxide, benzene, etc. Without the cabin air filter, these particles can enter the cabin, not only contaminating the air conditioning system and reducing the performance of the cooling system but also causing allergic reactions, lung damage, irritation from ozone, and unpleasant odors, all of which can affect driving safety. Replacement interval for the cabin air filter: The replacement interval for the cabin air filter generally depends on the vehicle usage. For typical urban family cars, it is recommended to replace the filter every six months or once a year.