Where is the cabin air filter located in a BMW 525?
2 Answers
BMW 525 cabin air filter is located in the engine compartment, next to the engine hood support rod. You can see it after opening the hood. Here is some additional information: Function of cabin air filter: The cabin air filter purifies the air entering the vehicle interior from outside, improving air cleanliness. It typically filters impurities in the air, including tiny particles, pollen, bacteria, industrial exhaust, and dust, to protect the air conditioning system and passengers' health, while also preventing window fogging. BMW 525 body dimensions: The BMW 525 measures 5047mm in length, 1860mm in width, and 1491mm in height, with a wheelbase of 3108mm.
I remember last time when I replaced the cabin air filter for my dad's BMW 525, it was located above the footwell on the passenger side. You need to crouch down and first remove the plastic panel under the glove compartment, which is usually secured with several clips or screws. Once opened, you can see the filter. Don't rush into it—prepare a small toolkit beforehand to avoid breaking the plastic parts. This location is quite common, but BMW's design pays attention to details—the filter is hidden inside, not in easily accessible spots like the front engine compartment or dashboard. After installing the new filter, the air inside the car became noticeably cleaner, and there was no more odor when the AC was on. I recommend checking it regularly and not delaying too long, as it affects both health and fuel efficiency.
