I have an 05 G35 coupe, I put in a drop in K&N filter and about a month later my mass flow sensor went bad.. Infinity told me that the oil from the K&N filter may have been the problem. They replaced the sensor and put a stock filter back in.. I had never heard of this before but I've been afraid to put the K&N back in.. Has anyone ever heard of a K&N filter damaging the MFS??

 

Haven't heard that one.

 

Yes its common actually. However it doesn't damage the MAF sensor it just makes it dirty. It is easily rectified by cleaning the sensor with a couple sprays from a can of mass air flow sensor cleaner which you can pick up at your favorite auto parts store. I would bet your old one would have worked fine had it been cleaned. Sorry you had to pay for a new one. I clean mine every couple oil changes since its so easy to do.

 

Thats why I dont use oil filters

 

Too quotable, lol

But i know what you mean.

Best to use dry flow filters these days, K&N stuff is from times of old, so to speak, when they didn't use MAFs.

I know Apexi make a dry flow, that'll be my next filter, currently running a Purolator.