Might be a different browser. I don't have K&N banner on my screen!
After posting this, I talked to few people that drove the X5 for a while, and everyone agrees that K&N in this vehicle is a potential trouble. I was hoping to hear from the owners that use CAI, or just the filter, and their experiences with that.
Here in the desert, the AF gets dirty fast, and I've been using K&N for a while for the ease of maintenance. Much easier to wash, and oil K&N, than to drive 200 miles to the dealer, and pick up OEM.