How often should I clean my K&N air filter?

K&N recommends cleaning your filter every 50,000 miles for normal highway use. If you drive in dusty conditions, you may need to clean it more often. Use a K&N filter cleaning kit to properly clean and re-oil the filter.

Does this filter come pre-oiled?

Yes, this K&N air filter comes pre-oiled and ready to install. You do not need to oil it before the initial installation. Just drop it in your factory airbox.

Is there a warranty on this air filter?

Yes, this K&N air filter is backed by K&N's 10-Year/Million Mile Limited Warranty. This warrants against defects in materials and workmanship for the life of the filter, up to 10 years or 1 million miles.

K&N 33-2458 Replacement Air Filter for BMW

Name: K&N 10-12 BMW 135i/335i/335i XDrive/X1 35i 3.0L L6 (E90) Replacement Air Filter
Brand: K&N
SKU: k-n-engineering-k-n-10-12-bmw-135i-335i-335i-xdrive-x1-35i-3-0l-l6-e90-replaceme-t14-251765
Price: 91.47 USD
Availability: InStock

K&N 10-12 BMW 135i/335i/335i XDrive/X1 35i 3.0L L6 (E90) Replacement Air Filter

$91.47

Only 7 left in stock

Washable and reusable air filter. Designed to increase airflow and horsepower.

Key Features

Washable filter — can be cleaned and re-oiled
Reusable filter — lasts longer than disposable paper filters
Increased airflow — designed to improve engine performance
Direct drop-in replacement — fits in the factory airbox
10-Year/Million Mile Limited Warranty — K&N stands behind their filters

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

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 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 No-Hassle Lifetime 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!