K&N 33-2005 Performance Air Filter - High-Flow Washable Reusable Panel Insert, Drop-In Intake Filter for Classic BMW E30 E28 E24 E23 E12 E21 E3 (3, 5, 6, 7 Series incl E30 M3) - Cotton Gauze Direct-Fit OEM Airbox Upgrade KN 33 2005

K&N 33-2005 Performance Panel Insert for Classic BMW Models

Give your classic BMW a freer-breathing intake with the K&N 33-2005 serviceable panel insert. This reusable cotton gauze element slips straight into the original airbox, improving intake efficiency while maintaining excellent filtration. Ideal for owners who want an intake upgrade without modifications, it is a long-term, clean-and-reuse solution that saves money over time and keeps your engine breathing consistently.

We run this filter on our own cars at MJ Modifications and our customers love the sharper throttle response, crisp induction note and the hassle-free maintenance. Clean, re-oil, refit, enjoy. No faff, no compromise.

Key benefits

• High-flow cotton gauze media that helps the engine breathe more freely
• Washable, reusable construction for long service life and reduced waste
• Direct-fit panel element for the standard BMW airbox on listed applications
• Robust build quality trusted by enthusiasts worldwide
• Great long-term value compared with disposable paper elements

Confirmed BMW fitment

The 33-2005 panel insert is suitable for the following BMW applications. If you are unsure, contact us and we will verify before dispatch.

• 3 Series - E21 318i 1.8. E30 316i 1.8, 318i 1.8, 320i 2.0, 323i 2.3, 325e 2.7
• 5 Series - E12 528 2.8. E28 518i 1.8, 520i 2.0, 525e 2.7, 525i 2.5, 528i 2.8, 535i 3.5
• 6 Series - E24 628CSi 2.8, 633CSi 3.2, 635CSi 3.4
• 7 Series - E23 728 2.8, 728i 2.8, 732i 3.2, 733i 3.2, 735i 3.5, 745i 3.2 3.5
• E3 - 3.0si, 3.2 Li
• M Series - M3 E30 2.3 1986-1991, 2.5 1990-1992. M5 E12 3.4

Highlights include iconic engines across the E30, E28, E24 and E23 ranges, such as 325e 2.7, 535i 3.5, 635CSi 3.4 and the legendary E30 M3.

Fitment check before shipping

For peace of mind, we confirm compatibility prior to dispatch. Add your UK registration or the last 7 characters of your VIN at checkout and we will verify the correct element for your vehicle.

Professional fitting

Want it installed for you. MJ Modifications offers expert fitting in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Part number

K&N 33-2005

Why buy from MJ Modifications

• Performance parts specialists with hands-on product knowledge
• Genuine brand-new components and fast UK dispatch
• Friendly advice, aftersales support and verified compatibility checks

Search-friendly terms customers use

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