K&N Air Filter 33-2231
- Our Price: $47.99
- Shipping:FREE SHIPPING
- Part Number: 33-2231
- Rating: (130)
- Part #: 33-2231
- Installation Instructions
Select your vehicle details above to ensure item compatibility.
- K&N Air Filters provide extra clean, unrestricted airflow to your engine for higher horsepower
- Designed to your exact year, make, and model vehicle's engine for a perfect fit
- Oiled pleated cotton gauze filter medium is washable and reusable - drive up to 50,000 miles between cleanings
- Reusable design is environmentally friendly - reduces waste for minimal landfill impact
- 50-State street legal
- Will not void or affect your vehicle's warranty
- The K&N Air Filter even improves your fuel economy, cutting down on your trips to the gas station
- K&N backs your Performance Air Filter with a 1,000,000 Mile / 10-Year warranty
K&N Filters are quite simply the best choice when it comes to engine filtration. This isn't news, either - drivers have turned to K&N to keep their engines breathing for over 30 years. Bolt one to yours, and you'll see why right away.
K&N Air Filters provide nearly unrestricted air flow to your engine, promoting combustion and enhancing your power and acceleration. It features 4-6 pleated sheets of oiled cotton-gauze, held between two layers of aluminum wire. This design effectively blocks dust and debris, keeping your engine breathing clean for maximum performance.
With a K&N Performance Air Filter under your hood, you'll never have to buy another filter again. It only takes a simple cleaning every 50,000 miles to keep this filter working for as long as you own your vehicle. Reusing your filter is not only convenient - it's good for the environment, too. Your K&N Air Filter is backed with a 10-Year / Million-Mile Warranty.
K&N 33-2231 fits:
- 1998-2002 BMW 316i
- 1999-2001 BMW 318Ci
- 1999-2001 BMW 318i
- 1999 BMW 318ti
- 1998-2005 BMW 320i
- 1999-2000 BMW 323Ci
- 1998-2000 BMW 323i
- 2000-2007 BMW 325Ci
- 2000-2005 BMW 325i
- 2000-2005 BMW 325xi
- 1999-2000 BMW 328Ci
- 2000 BMW 328i
- 2000-2006 BMW 330Ci
- 2000-2005 BMW 330i
- 2000-2005 BMW 330xi
- 2000-2007 BMW M3
- 2004-2006 BMW X3
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