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      09-22-2019, 05:08 PM   #1
HotSoss
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Drives: 2018 M550i XDrive, 2006 Z4
Join Date: Apr 2010
Location: Utah

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Cabin Air Filter Direction M550i

I decided to save the $200 the dealer wanted to replace the cabin air filters on my M550i (which BMW makes amazingly more difficult to change than other makes I own).. But in making the switch, I pulled the old ones out without noting the airflow direction, and I can't find arrows on the vehicle or online denoting the direction. I did read that in general, the airflow goes from the engine bay into the car, which would make sense, but I have no confirmation that's the case in my vehicle, or if the airflow direction is changed with the duct configuration. A few youtube videos suggest that the arrow should point to the FRONT of the car (seeming backwards to me?) Any ideas?

Last edited by HotSoss; 09-22-2019 at 10:20 PM..