Replace the the Engine Air Filter on an E90 (2006-2011) BMW 3 Series
2006, 2007, 2008, 2009, 2010, 2011 BMW 3 Series Models
BMW 3 Series Includes: 316, 318, 320, 325, 328, 330, 335 and M3 .
For this the only tool you’ll need is a T-25 Torx screwdriver.
Firstly, slacken all the screws shown in the first picture. Then lifting the air filter cover you will see that the pipe from just above the kidney grill joins this cover and is secured by two little tabs. By lifting the cover at an angle the tabs should release allowing you to remove the cover completely. Note that the screws do not unscrew fully and stay captive within the cover.
You can now see the air filter element. I was surprised to find a cylindrical filter!! In order to remove the air filter element there is a small clip at the front (circled in picture 3 and close up in picture 4). You need to press the circular area on either side and slide the filter forward. It will then come up and away from its mount.
There is an insert within the filter which is fixed and sealed in place.
Put the new filter in the same way the original was removed, replace the cover making sure the tabs lock into the inlet pipe and the screws all line up. Retighten the screws and you’re done!