K&N Drop-In Engine Air Filter for BMW 5 Series 520i E60/E61 (2003-2005) – Washable Reusable Panel Insert, High-Flow Cotton Gauze Airbox Filter, OEM-Size Direct Replacement, Performance Intake Upgrade for Saloon & Touring Petrol

BMW 5 Series 520i E60 E61 2003 to 2005 K&N Serviceable Intake Filter Element

Give your 5 Series petrol a simple, proven breathing upgrade with this K&N cotton gauze panel insert. It slides straight into the factory airbox on BMW 520i E60 and E61 models built in 2003, 2004 and 2005, delivering freer airflow for crisper throttle response and smoother pull without any cutting or tuning.

We run K&N filters on our own cars and customer vehicles at MJ Modifications. The verdict is consistent: better response, a subtle induction note under load and long-term savings thanks to the washable, reusable construction. Backed by K&N's famous Million Mile Limited Warranty and designed for long service intervals, it is a fit-and-forget intake upgrade that pays for itself over time.

Key benefits

• Higher intake flow compared to a disposable paper element for sharper pedal feel
• Multi‑layer oiled cotton media combines excellent filtration with performance breathing
• Direct fit to the original airbox on 520i E60 and E61 saloon and touring models
• No remap required and fully compatible with factory sensors and electronics
• Enhanced induction tone when accelerating while maintaining everyday refinement
• Washable and reusable lifetime filter that reduces waste and ongoing service costs
• Extended cleaning intervals, up to 50,000 miles depending on driving conditions
• Supported by K&N's Million Mile Limited Warranty

Compatibility

BMW 5 Series 520i E60 saloon and E61 touring, model years 2003, 2004 and 2005. Direct replacement for the standard air cleaner element in the stock airbox on these petrol models.

What you get

1 x K&N reusable panel filter insert for the BMW 520i E60 E61 2003 to 2005.

Care and maintenance

When the element is ready for service, clean and re‑oil with a K&N refresher kit, refit and drive. No need to buy throwaway filters again.

Professional installation

Want it fitted by specialists? MJ Modifications in Warwickshire can install this upgrade and carry out a health check on your intake system. Request a fitting quote: info@mjmodifications.co.uk.

Why buy from MJ Modifications

We specialise in performance upgrades for BMW and German marques, and we have hands‑on experience with these serviceable K&N inserts on the 520i platform. Our customers choose this solution for its reliable gains in response, long‑life value and eco‑friendly reusability.

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