[timfitz63]

... cold air intakes screw up MAF and other things ...

What's the conventional wisdom on using K & N air filters with the X3? I know one needs to be careful about using excessive oil when you replenish these filters, lest you affect the MAF sensor; but otherwise: good, bad, or indifferent...?

 

[timfitz63]

I'm running a K&N panel filter in both my X3 and M3. Just use the oil that comes in a spray bottle, like AFE's recharge kit and it will help to prevent over oiling. I don't have any issues so far. Using a K&N was more of a convenience thing for me and I'm sure it's flowing a little better. But it doesn't "feel" any different.

In the M3, I had a Macht Schnell filter and it was noticeable, but I sent it back b/c it didn't fit in the airbox very well; it was too loose.

Thanks! I've used K & N filters in other (older) vehicles without issue, but wasn't sure how the Bimmers liked them. Good to get the scoop first-hand!