K&N BMW Drop In Air Filter

Marsoni

M251S

$68.99

Get it in 3 business days with 1 day shipping. Friday, May 29

K&N BMW Drop In Air FilterSKU: 33 2231 UPC: 024844092304 K&N 33 2231 Replacement Air Filter for 1999 2006 BMW 3 Series M3 X3 K&N 33 2231 is a washable reusable high flow drop in air filter designed for select BMW models from 1999 to 2006. It features layered oiled cotton media that improves airflow for more horsepower and acceleration while trapping contaminants. This direct factory replacement installs in minutes and lasts the life of your vehicle. Key Features 4 Layers of

Easy Shipping

Quick Dispatch:

Your K&N BMW Drop In Air Filter orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your K&N BMW Drop In Air Filter ships.

Need Help?
Questions about K&N BMW Drop In Air Filter, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for K&N BMW Drop In Air Filter in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

i am a medium to wide-ish 7.5 in women's, that typically wears an 8 for room. these fit like a wider, roomy 8.5 women's. that is fine because i intend to wear them with thicker socks and for long walks.they are immediately comfortable, and do not feel like they will have the typical brutal break in period. very stable and fitted around the ankle, yet not impossible to pull on and off. they are so handsome, and meet my expectations.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on November 11, 2025