How to Change the Cabin Air Filter in a 5 Series BMW

1. Shut the engine off and open the hood.
2. Locate the cabin air filter compartment in the rear (near the windshield) part of the passenger side engine bay.
3. Remove the 13mm bolt from the assembly with a socket wrench. Unplug the pressure sensor connection from the assembly.
4. Flip up the two latches that attach the top part of the assembly. Lift the cover and the cabin air filter from the vehicle (the filter is attached to the cover).
5. Remove the old filter from the compartment cover. Insert the new filter, lining up the filter and cover notches.
6. Inspect the bottom part of the compartment for debris (leaves, twigs, etc.) Remove them from the compartment and wipe it with a dry towel.
7. Insert the top part of the compartment with the new filter. Snap up the two latches, reconnect the pressure sensor and tighten the 13mm bolt.
8. Repeat the process for the driver side cabin air filter.

How to Reset the E90 Cabin Air Filter Warning

1. Replace the cabin air filter if you have not done so already. Open the hood and examine the passenger side of the engine bay near the firewall to find the cabin air filter housing. The filter extends from one end of the engine bay to the other.
2. Remove the six 8mm bolts from around the cabin air filter housing. Lift the cover off to expose the filter.
3. Remove the old filter and discard it. Insert the new filter, replace the cover and tighten the bolts.
4. Insert your smart key into the electronic ignition. Press the Engine Start/Stop button without placing your foot on the brake (or on the clutch, if its a manual transmission). Wait for the service warning light to disappear.
5. Press and hold the trip odometer reset button (on instrument panel). Wait for the oil can icon to appear (it will appear after the service triangle) to indicate you are at the service menu.
6. Toggle the indicator stalk until you reach Cabin Filter. Press and hold the BC button at the end of the stalk to reset the interval and turn off the warning display.