Performance Air Filter for Audi A8 4H 2.0 to 4.2 (2010-2018)

High-Flow Drop-In Performance Air Filter for Audi A8 (4H)

What it Does: The BMC performance panel air filter replaces the restrictive factory paper element on the Audi A8 to lower intake pressure drop, maximize volumetric efficiency, and sharpen throttle response.

The Stock Audi A8 Airbox Limitation

Factory air filtration on the Audi A8 4H relies on dense, multi-pleated cellulose paper media. While adequate for basic dust holding capacity, standard paper creates significant parasitic intake resistance at higher mass airflow rates. As the media captures airborne particulate, the fibers swell and load unevenly, exacerbating pressure drop across the intake tract.

On forced-induction platforms like the twin-turbo EA824 4.0 TFSI and supercharged EA837 3.0 TFSI, this intake restriction forces the compressor to work harder, increasing intake air temperatures (IATs) and dampening low-end transient throttle response.

The Engineering Solution

The BMC FB743/08 performance air filter resolves intake restriction via multi-layered, low-viscosity oiled cotton gauze encased in an alloy mesh. Manufactured using a single-piece "Full Moulding" process without glued corners, the polyurethane frame eliminates seam breakage and bypass leaks inside the OEM airbox. This depth-filtration architecture stabilizes volumetric intake airflow while effectively stopping contaminants down to 7 microns.

The oiled gauze substrate delivers higher laminar airflow across the intake runner without triggering mass airflow (MAF) sensor faults, and the filter is fully washable and regenerable using a BMC cleaning kit.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• Audi A8 (4H) 2.0 Hybrid (265 HP) | 2012-2018
• Audi A8 (4H) 2.5 TFSI (204 HP) | 2012-2016
• Audi A8 (4H) 3.0 TDI (204 HP) | 2011-2013
• Audi A8 (4H) 3.0 TDI (211 HP) | 2010-2015
• Audi A8 (4H) 3.0 TDI (239 HP) | 2012-2016
• Audi A8 (4H) 3.0 TDI (250 HP) | 2010-2018
• Audi A8 (4H) 3.0 TDI (258 HP) | 2013-2018
• Audi A8 (4H) 3.0 TDI (262 HP) | 2015-2018
• Audi A8 (4H) 3.0 TFSI (290 HP) | 2010-2014
• Audi A8 (4H) 3.0 TFSI (310 HP) | 2013-2017
• Audi A8 (4H) 3.0 TFSI (333 HP) | 2010-2018
• Audi A8 (4H) 4.0 TFSI (420 HP) | 2012-2014
• Audi A8 (4H) 4.2 TDI [2 Filters Required] (350 HP) | 2010-2014
• Audi A8 (4H) 4.2 TDI [2 Filters Required] (385 HP) | 2013-2018

BMC marks the 4.2 TDI as [2 Filters Required]; each package contains 1 filter, so order 2 for that engine.

OEM Cross Reference (BMC): VW GROUP 4H0129620D, VW GROUP 4H0129620L

Frequently Asked Questions & Fitment Warnings

Does this fit the 4H A8?

Yes, this is a direct fit for the Audi A8 equipped with the 4H chassis factory airbox. Confirm your vehicle's specific airbox dimensions and whether your powertrain requires a dual-filter configuration prior to ordering.

Will installing this oiled cotton filter trigger a Check Engine Light (CEL)?

No, the precision oiled media is pre-treated from the factory and will not coat hot-wire MAF sensors or trigger air-fuel metering codes when installed correctly.

The Audi Engineering Caliber

Engineered to match European flagship executive standards, this panel filter maintains factory acoustic dampening and emission compliance while sustaining optimum airflow under heavy turbocharger load.