K&N High-Flow Reusable Engine Air Filter for BMW M140i 1 Series F20/F21 (2016+) - Drop-In Panel Intake, Washable Cotton, B58 OEM Airbox Replacement Performance Upgrade

BMW 1 Series M140i (F20/F21, 2016 onwards) High-Flow Panel Intake Filter by K&N

Unlock sharper throttle response and freer breathing on your turbocharged BMW M140i with this premium K&N high-flow panel insert. Designed for the factory airbox on the F20/F21 chassis, it’s a simple, proven upgrade for the 3.0-litre B58 without the need for any modifications.

Built around K&N’s oiled cotton gauze media, this reusable induction filter delivers excellent airflow while maintaining outstanding engine protection. Expect crisper response, improved mid-range pull and a more purposeful induction note, all with OEM fit and finish.

Why choose this intake filter for your M140i

• Direct-fit panel element for BMW 1 Series M140i F20/F21 (2016 on), including LCI
• High-flow cotton media supports better engine breathing for the B58
• Washable and reusable for the life of the car; service with a K&N cleaning kit
• Long service intervals, up to 50,000 miles between cleans depending on driving conditions
• Compatible with factory sensors and engine management, no remap required
• Does not compromise manufacturer warranty
• Backed by K&N’s Million Mile Limited Warranty

Real-world results

We run this exact panel filter on our own cars and countless customer M140is. Feedback is consistently positive: livelier response, smoother turbo spool and a subtle uplift in induction sound, all while retaining the reliability and convenience of the OEM airbox.

Key search terms our customers use

BMW M140i intake filter, F20 F21 panel filter, B58 induction upgrade, reusable cotton filter element, lifetime air filter, high-flow BMW 1 Series filter, drop-in panel insert, turbo intake upgrade, performance panel filter, washable air filter for M140i.

Fitment and installation

This is a straightforward drop-in panel for the standard airbox. Most owners can install it in minutes with basic tools.

Prefer professional fitting? Book in with MJ Modifications in Warwickshire. For a quote, email info@mjmodifications.co.uk.

What’s included

1 x K&N high-flow reusable panel intake filter for BMW 1 Series M140i (F20/F21).

Upgrade your induction path today and let your M140i breathe the way it should.