K&N Engineering 33-2231 High-Flow Replacement Air Filter for Select BMW Models

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product! K&N's replacement High-Flow Air Filters are designed to increase horsepower while providing exceptional engine protection, and are covered by K&N's No-Hassle Lifetime Limited Warranty. Associated products: 99-5000 Filter Care Service Kit Aerosol

• RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
• Million Mile Limited Warranty

Upgrade your vehicle’s factory air intake system with the K&N Engineering 33-2231 High-Flow Replacement Air Filter. This washable and reusable drop-in filter uses layered, oiled cotton media to improve airflow while helping capture harmful contaminants before they reach the engine. It is designed to install easily into the factory air box, making it a practical performance upgrade without requiring modifications to the original intake system.

The K&N 33-2231 air filter is engineered to support increased horsepower and responsive engine performance while providing dependable filtration. Premium materials and durable construction allow the filter to be cleaned, reused, and maintained throughout the life of the vehicle. It is backed by K&N’s 10-Year/Million Mile Limited Warranty, offering long-term value and confidence for daily driving and performance applications. For proper maintenance, pair it with the K&N 99-5000 Filter Care Service Kit Aerosol.

Application coverage includes select BMW models, including the 1999 BMW 318ti; 2000 BMW 328i and 328Ci; 2001–2003 BMW 330i; 2001–2003 BMW 330xi; and 2003 BMW 325xi. Verify vehicle application before installation. This automotive replacement filter is not CARB approved and may not be legal for use in emissions-controlled applications where applicable.

What’s Included

• One K&N Engineering 33-2231 washable, reusable high-flow air filter
• Installation for the factory air box

Features:

• High-Flow Airflow: Layered, oiled cotton filter media is designed to improve airflow and support increased horsepower.
• Washable and Reusable: Clean and reuse the filter throughout the life of the vehicle instead of replacing disposable filters.
• Rugged Construction: Premium materials and state-of-the-art construction methods provide durable, long-lasting performance.
• Easy Drop-In Installation: Designed to fit the factory air box for a straightforward replacement without intake system modifications.

Fitments:
1999 BMW 318ti Base
1999 BMW 323i Base
2000 BMW 323Ci Base
2000 BMW 323i Base
2000 BMW 328Ci Base
2000 BMW 328i Base
2001 BMW 325Ci Base
2001 BMW 325i Base
2001 BMW 325xi Base
2001 BMW 330Ci Base
2001 BMW 330i Base
2001 BMW 330xi Base
2001 BMW M3 Base
2002 BMW 325Ci Base
2002 BMW 325i Base
2002 BMW 325xi Base
2002 BMW 330Ci Base
2002 BMW 330i Base
2002 BMW 330xi Base
2002 BMW M3 Base
2003 BMW 325Ci Base
2003 BMW 325i Base
2003 BMW 325xi Base
2003 BMW 330Ci Base
2003 BMW 330i Base
2003 BMW 330xi Base
2003 BMW M3 Base
2004 BMW 325Ci Base
2004 BMW 325i Base
2004 BMW 325xi Base
2004 BMW 330Ci Base
2004 BMW 330i Base
2004 BMW 330xi Base
2004 BMW M3 Base
2004 BMW X3 2.5i
2004 BMW X3 3.0i
2005 BMW 325Ci Base
2005 BMW 325i Base
2005 BMW 325xi Base
2005 BMW 330Ci Base
2005 BMW 330i Base
2005 BMW 330xi Base
2005 BMW M3 Base
2005 BMW X3 2.5i
2005 BMW X3 3.0i
2006 BMW 325Ci Base
2006 BMW 330Ci Base
2006 BMW M3 Base
2006 BMW X3 3.0i

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1