Bimmerfest - BMW Forums - View Single Post - Cabin Air Filter Choices - OEM, Bosch, NPN
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Old 08-28-2011, 09:47 PM
Supercourse Supercourse is offline
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Location: British Columbia, Canada
Join Date: Feb 2008
Posts: 3,890
Mein Auto: 2004 X3 2.5i
It's part of a BMW Engine Oil Service,

along with check brake pad thickness, and check parking brake & adjust if necessary.

So every 15K miles or annually - under the no-charge scheduled maintenance.

Hard to believe yours hasn't been changed in 3 years.
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