K&N parts matching Mobil AF3221 air filter

The Mobil AF3221 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Mobil air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Tim Brick, Paradise Valley, Arizona
Great product. I purchased a 2012 x5d and was only getting 17.8 mpg - far below the stated 21 city. First tank of gas after I changed the air filter was 20.2. First thing I do with every new car is put a K&N filter in.
Ryan Wen, Benicia, California
Perfect fit for my 2013 X5D. It rides much smoother and lighter after installed K&N filter....love it.
Bo Jing, Edmonton, Canada
Significant difference and engine smoother.
33-2959 K&N 33-2959 Replacement Air Filter
List Price: $94.09
Your Price: $60.99