anyone using K&N Air Filters?

[PersonaNonGrata]

Originally Posted by Chris F.

Not to stir up a big controversey, but there have been problems with K&N filters and Mass Air Flow sensors, particularly on BMWs. I know some folks say its because of over-oiling the filter (the filter is reusable by cleaning and re-oiling it) but I still wouldn't take the risk (have you priced a MAF sensor? If the dealer sees that you have a K&N they will void coverage for the MAF).

Just my $.02 but I would not do it. I'm sure others will disagree...

I disagree with you for no other reason than to disagree.

I have heard the same thing and while I have used K&N's in other cars, including BMW's, I haven't bothered in the X5. I just don't see any benefit given the cost, the lack of any performance boost, and the potential MAF problems.