Performance Air Filter for BMW M135i, M235i, 128ti, X2 M35i & MINI JCW (2019-2026)

High-Flow BMC Performance Air Filter for BMW 1 Series, 2 Series (F40 / F44)

What it Does: The BMC Performance Air Filter replaces the restrictive factory paper element on the BMW 1 Series, 2 Series to lower intake restriction, increase volumetric airflow, and sharpen throttle response without triggering check engine lights.

The Stock BMW 1 Series, 2 Series Intake Restriction

Factory air filtration in the F40 and F44 platforms relies on dense, tightly packed cellulose paper elements. Under elevated boost targets, this dense factory media induces significant pressure drop across the intake tract, restricting CFM throughput to the turbocharger inlet. Furthermore, OEM paper elements absorb ambient moisture, degrade under heat cycling, and rapidly pack with road particulates, strangling intake velocity and worsening throttle lag on high-output B48 engines.

The Engineering Solution

Engineered to motorsport standards, this BMC drop-in panel filter uses multi-layer cotton gauze saturated with low-viscosity synthetic oil, secured within an epoxy-coated alloy wire mesh. This architecture permits up to 40% greater laminar airflow than standard paper media while screening micro-particulates down to 7 microns.

The perimeter features a continuous, single-mold polyurethane sealing bead that completely eliminates air bypassing and resists heat-induced warping inside the factory airbox, maintaining a flawless seal against the OEM intake plenum.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• BMW 2 Gran Coupe (F44) M235i (306 HP) | 2020-2024
• BMW 1 Series (F40) 128ti (265 HP) | 2020+
• BMW 1 Series (F40) M135i X (306 HP) | 2019+
• BMW X2 (F39) X2 M35i (306 HP) | 2019+
• Mini Mini III (F54,F55,F56,F57,F60) 2.0 JCW (306 HP) | 2019+
• Mini Mini III (F54,F55,F56,F57,F60) 2.0 JCW GP (306 HP) | 2020+

OEM Cross Reference (BMC): BMW 13718480400

Frequently Asked Questions & Fitment Warnings

Does this fit the F40 / F44 1 Series, 2 Series?

Yes, this is a direct fit for the BMW 1 Series, 2 Series equipped with the B48 2.0L turbocharged engine, seating directly into the factory airbox housing without modification.

Does this drop-in filter require ECU recalibration or tuning?

No, the increased airflow remains fully within OEM mass airflow sensor (MAF) operating parameters, providing bolt-on performance without lean conditions or check engine warnings.

The BMW Precision Standard

Designed for exacting European tolerances, this drop-in filter delivers maximum induction efficiency while protecting delicate turbocharger compressor blades and maintaining precise MAF fuel-trim calculations.