K&N High-Flow Cotton Gauze Panel Air Filter, Washable Reusable Drop-In for BMW 3 Series E46 318i/318Ci 1.9 Petrol (118 bhp) 1998-2001 – OEM Airbox Replacement Intake Induction Performance Upgrade

K&N Cotton Gauze Replacement Filter Element for BMW E46 318i and 318Ci 118 hp models

Give your 3 Series better breathing with a direct-fit K&N cotton media filter element that slots into the factory airbox on the 4-cylinder E46. This reusable intake filter improves airflow for sharper response and cleaner acceleration while maintaining excellent engine protection. We run these on our own cars and our customers love the crisp throttle feel and the long-term value of a serviceable filter.

Key benefits

• Optimised intake flow for livelier throttle response on the 318i and 318Ci 118 hp
• Premium oiled cotton gauze media for high filtration efficiency and strong airflow
• Direct-fit replacement for the stock airbox insert – no cutting, no coding, no remap
• Reusable and serviceable for the life of the vehicle – a cost-effective upgrade
• Extended service intervals – up to 50,000 miles between cleans depending on conditions
• Compatible with factory sensors and electronics
• Supported by K&N’s Million Mile Limited Warranty

Vehicle compatibility

Designed for the BMW 3 Series E46 4-cylinder 118 hp petrol variants with the standard airbox:

• BMW E46 318i – 1998, 1999, 2000, 2001
• BMW E46 318Ci – 1999, 2000, 2001

Not sure if this suits your registration or build year? Message us and we will confirm fitment before you order.

What you will notice

• Quicker pick-up from low and mid-range
• Smoother revs thanks to reduced intake restriction
• Reusable element that pays for itself versus repeated paper filter changes

Quick home install

Swap in minutes with basic tools. Open the airbox, remove the paper element, seat the K&N filter, and refit the lid. No drilling, no modifications, no ECU tweak.

Care and servicing

Clean and re-oil using a K&N service kit when required. Service intervals can reach up to 50,000 miles depending on driving environment. Follow K&N’s care instructions for best results.

Professional fitting

Prefer a specialist to install it for you? MJ Modifications in Warwickshire offers expert fitting. Request a quote at info@mjmodifications.co.uk.

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