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. Regular cleaning ensures proper airflow and performance.

Do I need to oil this filter?

Yes, this K&N filter uses a specially formulated oil to help trap dirt and contaminants. After cleaning, you'll need to re-oil the filter with K&N filter oil to maintain its effectiveness.

What is the warranty on this K&N air filter?

This K&N air filter is backed by K&N's 10-Year/Million Mile Limited Warranty. This means K&N warrants that the filter will be free from defects in material and workmanship for up to 10 years or 1 million miles.

K&N Replacement Air Filter BMW 525I L6-2.5L 24V (M50)

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K&N Engineering

K&N Replacement Air Filter BMW 525I L6-2.5L 24V (M50)

Name: K&N Replacement Air Filter BMW 525I L6-2.5L 24V (M50)
Brand: K&N Engineering
Price: 83.99 USD
Availability: InStock

$83.99

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

Key Features

Washable — clean and re-oil for extended use
Reusable — save money compared to disposable filters
Designed to increase horsepower — get more power
Direct drop-in replacement — installs in the factory air box
Backed by K&N's 10-Year/Million Mile Limited Warranty

⚠️ 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

Fits these vehicles

BMW 525i 1989-1995
BMW 525iT 1993
BMW M5 1991-1993

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Since 1957

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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!