K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

Vehicle Fitment

Years	Make	Model	Trim
1991–1994	BMW	318i	Base
1991–1994	BMW	318is	Base
1988	BMW	325	Base
1986–1987	BMW	325e	Base
1987–1991	BMW	325i	Base
1987–1990	BMW	325is	Base
1988–1991	BMW	325ix	Base
1989–1991	BMW	525i	Base
1986–1988	BMW	528e	Base
1988–1994	BMW	750il	Base
1993–1997	BMW	850ci	Base
1994–1995	BMW	850csi	Base
1991–1992	BMW	850i	Base