BMW E90 318D Air Filter Replacement | K&N Air Filter Upgrade - YouTube
Drop in air filter (K&N and the like) - XBimmers | BMW X3 Forum
Drop in air filters. Read before changing...important - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
Intake Filter Compatibility — M550i — Good News? - BMW X5 Forum (G05)
For 07-12 BMW 328i E90/E92/E93 3.0L 6cyl Black Cold Air Intake + K&N Air Filter | eBay
Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Premium, Replacement Car Air Filter: Compatible with 2006-2014 BMW (128i, 328i, 325i, 328i xDrive, 330i, 130i, 328xi), 33-2332 : Automotive
K&N airfilter for BMW 3er (E90/E91/E92/E93) (330d, 231 PS, Year. 9/05, 108,57 €
K&N Air Filters for ESS/VF Supercharger - BMW M3 Forum (E90 E92)