K&N air filter for 09 335i xdrive - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 01-31-2009, 11:15 AM
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K&N air filter for 09 335i xdrive

hello everyone, new bmw owner and first post to the forums, has anyone put a k&n air filter into their new 09 . i have them in all my cars, will it harm or void the warranty. i know some cars electronics will adjust to the increased air flow and i'm assuming the same with this car. any thoughts or info would be helpful.
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#2 (permalink) Old 01-31-2009, 12:16 PM
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You will void your warranty, I suppose you could put one on ,but every time it goes to the dealer you will have to put the stock filter/box back on, then that might raise eyebrows as the filter won't be very dirty for the mileage.

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