Purchase the following wear parts.
- filter element. When purchasing, please note that there are different filter elements for different types of engines.
Models 520i/525i from May 1990 and 530i/535i/524td: Loosen hose clamp 1 and disconnect air intake hose from air filter. The figure shows a diesel engine.
Open clips -arrows- on filter housing. The number of clamps is different for different models.
520i/525i models since May 1990 (four-valve engines): Loosen the 2 screws on the bracket.
Remove the cover and take out the filter element 1.
Wipe the filter housing with a cloth.
For light soiling, carefully knock out the filter element with the dirty side down.
A clogged filter must be replaced.
Attention: Do not clean the filter element with petrol or cover it with oil. Do not blow out the filter with compressed air.
Installation
Insert the filter element into the air filter housing.
Place a lid on top. On a diesel engine, ensure that the tabs on the cover fit into the bottom. Close clamps.
If removed, connect the air hose, secure it with a clamp.
Four-valve engine: Insert the air filter housing and screw it to the bracket.