Performance Air Filter for BMW 3 Series E36 316i / 318i / 318ti, Z3 1.8 / 1.9

Optimize Induction Flow for the BMW M40, M43 & M44 Engine Platforms

Who It’s For: Engineered for BMW Z3 and E36 owners running the M40, M42, M43, or M44 four-cylinder powerplants who are tired of the stock sluggishness and restrictive factory filtration.

The Symptom: The factory intake on the 1.6L and 1.8L BMW engines is designed for silence and cost-efficiency, not peak performance. It utilizes a dense, accordion-style paper filter that creates a significant pressure drop as air struggles to pass through the tight fibers. For a chassis like the Z3 or the E36 3-Series, this lack of air density results in a "lazy" throttle response and a noticeable dip in torque when trying to merge or accelerate out of a corner, effectively choking the engine’s ability to breathe.

The Engineering Fix: This BMC Performance Air Filter replaces the restrictive OEM paper with a high-flow, multi-layered cotton gauze media. By using a "Full Moulding" system, the filter is constructed from a single mould with no welded joints, ensuring a perfect seal and preventing air bypass. The cotton layers are soaked in a low-viscosity oil and reinforced with an epoxy-coated alloy mesh, allowing the system to capture impurities as small as 7 microns (compared to the 10-micron limit of paper) while significantly increasing the total cubic feet per minute (CFM) of air reaching the combustion chamber.

Why Mechanics Choose This Kit

• Enhanced Volumetric Efficiency: By reducing the intake restriction, your engine spends less energy "pumping" air and more energy delivering power to the rear wheels.
• Superior Filtration Chemistry: The multi-layered cotton gauze is designed to maintain high flow rates even as it traps debris, unlike paper which loses flow exponentially as it gets dirty.
• Built for Longevity: This is a "lifetime" filter. It is fully washable and regenerable using a BMC cleaning kit, eliminating the need to ever buy a disposable filter again.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• BMW 3 Series (E36) 316i (102 HP) | 1993-1999
• BMW 3 Series (E36) 318i (113 HP) | 1990-1999
• BMW 3 Series (E36) 318i (115 HP) | 1990-1999
• BMW 3 Series (E36) 318i S (140 HP) | 1993-1999
• BMW 3 Series (E36) 318i S (140 HP) | 1995-1999
• BMW 3 Series (E36) 318i S Coupe (140 HP) | 1992-1995
• BMW 3 Series Compact (E36) 316i Compact (102 HP) | 1994-2000
• BMW 3 Series Compact (E36) 316i Compact (105 HP) | 1998-2000
• BMW 3 Series Compact (E36) 318ti Compact (140 HP) | 1994-1995
• BMW 3 Series Compact (E36) 318ti Compact (140 HP) | 1995-2000
• BMW Z3 1.8 (116 HP) | 1996-1998
• BMW Z3 1.8 (118 HP) | 1998-2003
• BMW Z3 1.9 (140 HP) | 1996-1999
• BMW Z3 1.9 (118 HP) | 1998-2003
• BMW Z3 1.9 (116 HP) | 1999-2003

OEM Cross Reference (BMC): BMW 13711247405, 13721247404, 13721247405, 13721247637

The Performance Promise

Buy with confidence. Every BMC filter is pre-oiled and ready for immediate installation. Maximize your BMW’s potential with the same technology used by top-tier Formula 1 and GT teams. Backed by real automotive experts and fast shipping.

Common Questions

Which BMW models does it fit?
BMC lists the E36 316i, 318i and 318iS, the E36 Compact 316i and 318ti, and the Z3 1.8 and 1.9.

Is it a direct fit?
Yes. It replaces the factory element in the stock airbox with no modifications.

Can I clean and reuse it?
Yes. Wash and re-oil it with a BMC regeneration kit.

How fine is the filtration?
The multi-layer oiled cotton traps particles down to 7 microns.

What will I notice after installing it?
Sharper throttle response and a stronger intake sound.