Not sure which 1999 BMW 3-Series Air Filters are right for you? We have over 14810 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I received a marked improvement in the responsiveness of my BMW immediately after installing the K&N. Leaving stop lights the car's rear wheels broke loose several times. It was necessary to adjust the way I accelerated the car to avoid this from happening. The car had never done that before. Highway 0-60 has improved also. It has given new life to an old car.
Wish I'd put the K&N filter in years ago." —K. David H from Alamo, CA bought a K&N Air Filters for a 1999 BMW 3-Series, 323iS, 2.5L 6-cyl. engine.