K&N High-Flow Performance Panel Air Filter for BMW 4 Series F32/F33/F36 420i 428i (2013-2015) - Washable Reusable Oiled Cotton Gauze, Lifetime Drop-In Intake/Induction Filter, Direct OEM Airbox Replacement, 2.0L Petrol

K&N Reusable Sports Panel Filter for BMW 4 Series 420i and 428i 2013 to 2015

Give your BMW 4 Series the breathing it deserves with this serviceable K&N cotton gauze panel element. It drops straight into the factory airbox on 420i and 428i models built between 2013 and 2015, helping your engine inhale more efficiently for sharper throttle response, smoother acceleration and a more eager feel, while maintaining excellent filtration to protect your motor.

What you will notice

• Crisper throttle and more responsive pull across the rev range
• Freer-flowing intake compared with a disposable paper element
• Premium multi-layer oiled cotton media for strong filtration and airflow
• Clean and refit when required to use it for the life of the vehicle
• Eco-friendly alternative that reduces waste and ongoing costs
• Direct fit into the standard BMW airbox with no mapping required
• Fully compatible with factory sensors and ECU strategy

Fitment

BMW 4 Series petrol models: 420i and 428i, years 2013, 2014 and 2015. Chassis: F32 Coupe, F33 Convertible, F36 Gran Coupe. Designed to fit the original airbox.

Why we rate it

We have fitted these K&N panels to customer cars and our own demonstrators and the feedback is consistently positive. It is a simple upgrade that livens up response, saves money over time and keeps filtration performance high. A proper quality piece, built to last.

Installation

DIY friendly. Open the factory airbox, remove the old paper element and drop in the K&N panel. Ensure the sealing edge is seated correctly and reclip the lid. No remap or additional hardware required.

Care and servicing

Long service intervals. Clean and re-oil using a genuine K&N cleaning kit when the filter appears dirty or approximately every 50,000 miles in normal road use. Follow K&N care guidance for best results.

Professional fitting

Prefer expert installation. MJ Modifications in Warwickshire can fit this for you. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW F32 F33 F36 panel filter UK, BMW 420i sport air filter, BMW 428i intake filter upgrade, cotton gauze engine filter BMW, washable reusable BMW air filter, K and N panel element for BMW 4 Series, direct fit airbox filter BMW, BMW 4 Series petrol filter upgrade, serviceable air filter BMW UK, lifetime BMW filter, high flow cotton filter BMW 2.0 petrol, BMW F36 Gran Coupe airbox filter, BMW 4 Series performance breathing upgrade, BMW 420i 428i filter replacement UK, MJ Modifications Warwickshire fitting.

Ready to refresh your BMW’s breathing. Add to basket and enjoy an easy, worthwhile upgrade.