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gslracing said:
If I buy a replacement K&N Air Filter & put it on my car will it void the warranty?:dunno:
Ahhh...lessee....

Pro: Put K&N Filter on. Replace BMW OEM filter. Engine suffers catastrophic failure. Dealer: "Hmmm...looks like your filter element failed and was ingested by the engine; hoho, what's this?! K&N?? Sir, your warranty is void and you are snookered." You: "But I asked on an internet bimmerboard and they said it was ok?!" Dealer: "Hahahahahahah, good one. Next."

Con: Keep OEM filter. Um, there are not other cons here. Car is under warranty, end of story.

Kind of a no brainer to me? Don't do it till your warranty expires. YMMV. :dunno:

EDIT - Syntax.
 

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Discussion Starter · #3 ·
Thanks for the info wingspan good advice. I know ask stupid question get...Duh!!! Or replace K&N with stock filter before I take it to dealer for service....Duh!!!
 

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resU deretsigeR
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I would never use a K&N filter on a recent BMW.

BMWs have large airboxes and filters. The power increse from a K&N filter on an otherwise stock motor will be very very small or zero.

Oil will migrate off of the filter and work its way downstream. It will contaminate all sorts of things. I had this happen on my '94 Dodge Pickup. The truck was off road a lot and I got the K&N to save on paper filters. Big mistake.

On a BMW there is a chance the oil get will into the MAF sensor. If the dealer finds it full of oil, they are can charge you for the part, even if the oil isn't what made it fail.
 
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