Filter Replacement

Air Filter Element Replacement

1. 520i 523i 528i: Press the retaining tabs on the left and right of the filter element holder and remove the holder.

2. 525tds: Disconnect the intake duct. Remove the bolts and remove the cylinder head cover.

3. Remove the air filter element.
4. Wipe the filter housing with a cloth.
5. If there is minor contamination, carefully tap out the element with the dirty side facing down. Replace an oily filter.

* Do not clean the filter element with gasoline or coat it with oil. Do not blow out the filter with compressed air.

INSTALLATION
1. Insert the new filter element into the housing. The gasket must be seated in the groove.
2. 520i 523i 528i: Install the holder and engage both retaining tabs.
3. 525tds: Evenly secure the cover to the cylinder head with the bolts. Secure the intake duct to the engine.

Cabin Air Filter Replacement

No special tools are required.

* If the filter flow area decreases prematurely, the filter must be replaced. Under normal conditions the filter is replaced during scheduled maintenance.
Both filters are located on the right and left sides in the engine compartment.

REMOVAL
1. Open the hood.

2. Move the clips forward. Open the filter cover.

3. Remove the filter element.

INSTALLATION
1. Install the new filter element.
2. Install the cover and secure the clips.
3. Replace the filter on the other side in the same way.
4. Close the hood.