K&N High-Flow Drop-In Air Filter for Select Audi, BMW, and VW 1996-2009 (2.0T) 33-2125

Fits select 1996-2009 Audi A4, A6, Allroad, S4, S6, BMW X5, Z8, and Volkswagen Passat models (2.0T).

The K&N 33-2125 High-Flow Air Filter is a performance-oriented drop-in replacement designed to increase airflow while maintaining critical engine protection. Unlike disposable paper filters that must be replaced regularly, this filter uses K&N’s signature state-of-the-art oiled cotton media. This layered design creates a deep-loading environment that captures contaminants effectively without the restriction common in stock filters.

Engineered for longevity, this washable and reusable filter installs directly into your factory air box in minutes. It is designed to last for the entire lifespan of your vehicle, reducing waste and providing a cost-effective alternative to frequent filter changes. Every 33-2125 filter is backed by K&N’s 10-Year/Million Mile Limited Warranty, ensuring reliable performance across hundreds of thousands of miles.

• Part Number: 33-2125
• Filter Material: Layered, oiled cotton media
• Washable and reusable for the life of the vehicle
• Designed to fit directly into the OEM air box
• Improves airflow compared to standard paper filters
• Manufacturer Warranty: 10-Year/Million Mile Limited