K&N High-Flow Washable Air Filter for Select 1999-2006 BMW 3 Series and X3 (33-2231)

Fits select 1999-2006 BMW 3 Series and X3 models including 318ti, 323i, 325i, 328i, 330i, M3, and X3 2.5i/3.0i.

The K&N High-Flow Air Filter is a performance-driven, washable alternative to standard disposable paper filters. Designed to drop directly into your BMW's factory air box, this replacement filter features a state-of-the-art design using layered, oiled cotton media. This construction is engineered to improve airflow and capture contaminants more effectively, helping your engine breathe more efficiently for an increase in horsepower.

Built for the long haul, these filters are designed to last the entire lifespan of your vehicle and are supported by K&N's 10-Year/Million Mile Limited Warranty. Beyond the performance benefits, choosing a reusable filter reduces the environmental impact of disposable filters and packaging waste that typically end up in landfills.

• Direct drop-in replacement for factory intake housings
• Layered, oiled cotton media for superior airflow and filtration
• Washable and reusable design engineered for the life of the vehicle
• Backed by K&N's 10-Year/Million Mile Limited Warranty
• Simple installation with no tools required for most models
• Manufacturer Part Number: 33-2231