Not sure which 2011 BMW 3-Series Air Filters are right for you? We have over 12273 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:
"Installation instructions did not address additional hoses or lines that prevented the easy removal of the existing air filter and installation of the KN Air Filter.AC Hoses were a minor problem, but finally was able to manipulate things and get it installed. A 5 minute job took 20 minutes.But got it installed, and there is a slight increase in power." —Toby W from San Jose, CA bought a K&N Air Filters for a 2011 BMW 3-Series.