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

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

Do I need to oil this filter?

Yes, this K&N air filter uses a specially formulated oil to help trap dirt and contaminants. A K&N filter cleaning kit is recommended to properly clean and re-oil your filter.

What is the warranty on this air filter?

K&N warrants its air filters to be free from defects in material and workmanship for 10 years or 1,000,000 miles. This warranty applies when the filter is properly installed and maintained.

K&N 33-2367 Drop In Air Filter for BMW 135/335/535

Name: K&N 06-09 BMW 135/335/535 Drop In Air Filter
Brand: K&N
Price: 68.99 USD
Availability: InStock

K&N 06-09 BMW 135/335/535 Drop In Air Filter

$68.99

Only 3 left in stock

Washable and reusable air filter. Drops right into the factory air box for improved airflow.

Key Features

Washable and reusable — save money on replacement filters
Designed to increase horsepower — get better performance
Drop-in replacement — installs easily into the factory air box
Oiled cotton gauze media — allows for high airflow with excellent filtration

⚠️ 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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Will this fit your vehicle?

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!