K&N 33-2078 High-Flow Washable Performance Panel Air Filter - OEM Replacement for BMW 5 Series E34 (1989-1997) 520i, 525i, M5

K&N 33-2078 Performance Panel Insert for BMW E34 5 Series

Give your classic 5 Series the breathing it deserves with the K&N 33-2078 panel insert. This serviceable, oiled cotton gauze air cleaner is a direct swap for the factory element in the standard airbox, letting your engine ingest air more efficiently for smoother acceleration, sharper throttle pick up and a more engaging drive. It is a proven upgrade for everyday use and spirited road driving on applicable E34 models.

We run K&N filters on our own cars and our customers love the build quality, the noticeable improvement in response and the long-term savings of a washable, reusable element. If you are searching for a sports panel filter for BMW E34, a reusable air cleaner element for 520i or 525i, or an induction upgrade for the E34 M5, this is the go-to choice.

Key benefits

• High-flow, multi-layer cotton media for improved intake efficiency and crisp engine response
• Washable and reusable design for long service life and reduced running costs
• Direct-fit panel element for the stock airbox with no cutting or modifications
• Durable construction with robust sealing for consistent filtration
• Great for daily driving and performance-focused enthusiasts

Part number

K&N 33-2078 (also searched as 33 2078 and 332078)

Fitment guide

Suitable for selected BMW E34 applications. Please verify your exact variant before ordering.

• BMW 5 Series E34 520i 2.0 24V 1989–1995 and 1991–1997
• BMW 5 Series E34 525i 2.5 24V 1989–1995 and 1991–1997
• BMW M5 E34 3.6 1988–1992, 3.8 1992–1997

Tip: If your car is listed as 520i, 525i or M5 within the E34 generation, this panel insert is the correct size for the original airbox on the models above.

Compatibility check before dispatch

We will double-check fitment prior to shipping. Add your UK registration or the last 7 of your VIN at checkout so we can confirm the correct filter for your car.

Installation and support

Drop-in fit with basic tools. No mapping or additional parts required. Prefer professional installation or a health check of your intake system? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

Common search terms

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