Air Intake Filters for BMW 3 Series E30 (1984-1991)

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We stock several replacement and performance drop-in air filters for your BMW. Replacing your intake filter (or filters, depending on vehicle) can improve your BMW's performance immediately.
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K&N - Corporate Logo
T#:4005
Part#: 33-2005
In Stock
$ 104.99 USD
Free Shipping
$ 104.99 USD
Free Shipping

K&N's drop-in air intake filter is constructed from cotton gauze material between aluminum mesh - this makes for a long lasting, high performance drop-in intake filter. These are very easy to remove and maintain. Turner Motorsport recommends this as one of the first maintenance/modifications you make to your vehicle after you purchase! 

K&N's drop in air filters allow increased airflow - dirt and particles stick to the oil on these filters, making them more effective than traditional paper filters in terms of protection. Additionally, K&N believes their filters are more efficient than paper filers - this means more oxygen getting into the engine, allowing vaporized fuel to burn more efficiently and increasing horsepower and fuel economy. The best of both worlds!

  • Covered by the K&N Million Mile Limited Warranty
  • Washable and reusable
  • Emissions legal in all 50 states
  • Will not void vehicle warranty
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K&N - Corporate Logo
T#:4006
Part#: 33-2059
Ships in 4 Business Days
$ 57.99 USD
Free Shipping
$ 57.99 USD
Free Shipping

K&N's drop-in air intake filter is constructed from cotton gauze material between aluminum mesh - this makes for a long lasting, high performance drop-in intake filter. These are very easy to remove and maintain. Turner Motorsport recommends this as one of the first maintenance/modifications you make to your vehicle after you purchase! 

K&N's drop in air filters allow increased airflow - dirt and particles stick to the oil on these filters, making them more effective than traditional paper filters in terms of protection. Additionally, K&N believes their filters are more efficient than paper filers - this means more oxygen getting into the engine, allowing vaporized fuel to burn more efficiently and increasing horsepower and fuel economy. The best of both worlds!

750iL/850i requires 2 filters

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Mann Engine Air Filter - E12, E21, E23, E24, E28, E30
For vehicles with production date to 09/1985 and a sheet metal airbox
Mann - Corporate Logo
T#:580587
Part#: C3394
In Stock
$ 34.99 USD
Free Shipping on orders $49 and up
$ 34.99 USD
Free Shipping on orders $49 and up
Keep your engine breathing fresh air

Mann - Corporate Logo
T#:3998
Part#: 13721715881
In Stock
$ 18.99

This product was last offered at the strikethrough price on
03-24-2026

$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
Replacement air filter

This item fits the following BMWs:
1986-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix
1992-3/1994 E36 BMW 318i 318is 318ti 318ic
1986-1988 E28 BMW 528e
1989-1990 E34 BMW 525i
1988-1994 E32 BMW 750il - 2 required
1990-1999 E31 BMW 850i 850ci - 2 required
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