K&N High-Flow Engine Air Filter 33-3136 for 2019–2026 BMW & Supra — Washable, Lifetime Replacement

K&N High-Flow Original Lifetime Engine Air Filter 33-3136 is a washable, reusable replacement filter engineered to increase airflow and support improved engine performance for many 2019–2026 BMW models and the Toyota Supra.

This K&N filter replaces disposable paper elements with a multi-layer cotton gauze design that’s pre-oiled, built to fit the factory airbox, and intended to last the life of the vehicle. Backed by K&N’s limited lifetime warranty, the 33-3136 is made in the USA and aims to reduce replacement costs and landfill waste while offering straightforward installation in a few minutes.

How does this filter affect everyday driving and performance?

The High-Flow media is engineered to allow more air into the intake than standard paper filters, which can support stronger throttle response and more efficient combustion under many conditions. Gains depend on engine configuration and tuning, but owners commonly report improved acceleration feel and smoother power delivery.

• Up to increased airflow versus stock paper filters, supporting improved engine breathing
• Pre-oiled cotton gauze media designed for consistent airflow and filtration
• Form-fit to the factory airbox for minimal changes to intake layout

What maintenance does the K&N 33-3136 require and how often?

Unlike single-use filters, this K&N element is washable and reusable; typical highway driving suggests cleaning around every 75,000 miles. Cleaning intervals vary with driving conditions—dusty or off-road use will require more frequent servicing—yet each service is straightforward with K&N cleaning kits.

• Clean approximately every 75,000 miles under normal highway conditions
• Use K&N filter cleaner and re-oil per the included instructions
• Reusable design reduces recurring replacement purchases and waste

Will this filter fit my car and is installation difficult?

The 33-3136 is manufactured to replace the factory air filter in many BMW model years from 2019–2026 and certain Toyota Supra and Alpina vehicles—check the compatibility list for exact fits. Installation is usually a quick drop-in into the stock airbox with basic hand tools, taking only a few minutes for most DIYers.

• Compatible with a broad range of BMW 2/3/4-series, Z4, M models and Toyota Supra years listed
• Designed to match factory airbox dimensions for an easy swap
• Simple installation—no permanent modifications required

What are the construction and warranty highlights of this K&N filter?

This filter uses multiple layers of oiled cotton gauze treated to trap particulates while maintaining airflow; a robust frame and media construction aim for long service life. K&N supports many of its replacement filters with a limited lifetime warranty and tests product performance on demanding tracks and road conditions.

• Four-layer cotton gauze filtration for a balance of flow and protection
• Durable construction intended for lifetime use in normal service
• Backed by K&N’s limited lifetime warranty (limitations apply)

Who is this for: The K&N 33-3136 is aimed at drivers who own compatible BMWs, Toyota Supra, or Alpina models and want a long-lasting, washable alternative to disposable filters. It appeals to performance-minded owners seeking easier airflow, reduced recurring filter purchases, and a plug-and-play upgrade that fits the factory airbox without complex modifications.

Features:

• Engineered power with high-flow filter media
• Rugged, long-lasting construction made in the USA
• Four layers of cotton gauze to trap contaminants
• Clean every ~75,000 miles under normal highway driving
• Limited lifetime warranty and eco-friendly reusable design
• Pre-treated, ready to install into the factory airbox