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Upgrade your Audi A4 with the K&N Engineering 33-2209 High-Flow Drop-In Air Filter, designed to deliver improved airflow and engine performance. Crafted with layered, oiled cotton media, this washable and reusable filter effectively captures contaminants while boosting horsepower. Its state-of-the-art design ensures a perfect fit into your factory air box, making installation straightforward without the need for modifications. Engineered for longevity, this filter is built to last for the entire lifespan of your vehicle, backed by K&N's 10-Year/Million Mile Limited Warranty, providing peace of mind and reliable performance over time.
The K&N 33-2209 filter enhances engine efficiency by increasing air intake, which can contribute to better acceleration and throttle response. Its superior filtration capabilities help protect your engine from dirt, debris, and other harmful particles, ensuring optimal operation. The filter's durable construction allows for multiple cleaning cycles, making it a cost-effective upgrade that combines high performance with environmental sustainability. Suitable for various Audi A4 and Quattro models from 2003 to 2009, this product is an excellent choice for drivers seeking to maximize their vehicle's potential.
Installation is quick and hassle-free, with the drop-in design requiring no additional tools or modifications. Regular maintenance involves cleaning and re-oiling the filter to maintain peak performance. Whether you're a daily driver or an enthusiast looking to enhance your vehicle's power, the K&N 33-2209 offers a reliable solution to improve airflow and engine response while providing long-term durability and protection.
Features:
Fitment:
2002 Audi A4 Base
2002 Audi A4 Quattro Avant
2002 Audi A4 Quattro Base
2003 Audi A4 Base
2003 Audi A4 Cabriolet
2003 Audi A4 Quattro Avant
2003 Audi A4 Quattro Base
2004 Audi A4 Base
2004 Audi A4 Cabriolet
2004 Audi A4 Quattro Avant
2004 Audi A4 Quattro Base
2004 Audi A4 Quattro Cabriolet
2004 Audi S4 Avant
2004 Audi S4 Base
2004 Audi S4 Cabriolet
2005 Audi A4 Base
2005 Audi A4 Cabriolet
2005 Audi A4 Quattro Avant
2005 Audi A4 Quattro Base
2005 Audi A4 Quattro Cabriolet
2005 Audi S4 Avant
2005 Audi S4 Base
2005 Audi S4 Cabriolet
2006 Audi A4 Base
2006 Audi A4 Cabriolet
2006 Audi A4 Quattro Avant
2006 Audi A4 Quattro Base
2006 Audi A4 Quattro Cabriolet
2006 Audi S4 Avant
2006 Audi S4 Base
2006 Audi S4 Cabriolet
2007 Audi A4 Base
2007 Audi A4 Cabriolet
2007 Audi A4 Quattro Avant
2007 Audi A4 Quattro Base
2007 Audi A4 Quattro Cabriolet
2007 Audi RS4 Base
2007 Audi S4 Avant
2007 Audi S4 Base
2007 Audi S4 Cabriolet
2008 Audi A4 Base
2008 Audi A4 Cabriolet
2008 Audi A4 Quattro Avant
2008 Audi A4 Quattro Base
2008 Audi A4 Quattro Cabriolet
2008 Audi RS4 Base
2008 Audi RS4 Cabriolet
2008 Audi S4 Avant
2008 Audi S4 Base
2008 Audi S4 Cabriolet
2009 Audi A4 Cabriolet
2009 Audi A4 Quattro Cabriolet
2009 Audi S4 Cabriolet
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
