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

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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The part appears decently made in China. The end that terminates below the oil filter would not mount (too tight). I gently sanded the o-ring groove, lubricated and I put the part in freezer. After two hours of sanding the groove I got the part seated. Good thing I was patient today. Pain in the butt.

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Reviewed in the United States on December 12, 2020

Verified Purchase

Man with plan

Battle Creek, US

★★★★★ 5

Highly recommend

Perfect fit for my Mercedes C300 V6

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Reviewed in the United States on March 1, 2026

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