Performance Air Filter for BMW 3, 4, 5, 6 & 7 Series 3.0 Diesel (2011-2020)
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Precision Air Induction for the BMW N57 Diesel Platform
Who It’s For: Engineered for BMW owners running the N57 inline-six diesel powerplant across the F-Chassis range who want to optimize turbo efficiency without compromising engine longevity.
The Symptom: The factory air filtration system on the N57 engine is built around a thick, restrictive paper element designed for maximum sound suppression and long service intervals. For a high-torque diesel engine, this creates a significant bottleneck. As the turbochargers attempt to spool, they have to work harder to pull air through the dense paper fibers, leading to a measurable pressure drop in the intake tract.
This results in a slight delay in throttle response, especially during low-end acceleration or when merging on the highway.
The Engineering Fix: The BMC FB821/04 filter replaces that restrictive paper with a multi-layered cotton gauze system. By using four layers of surgical-grade cotton soaked in a low-viscosity oil, we change the fluid dynamics of the intake. Instead of air hitting a paper wall, it flows through an epoxy-coated alloy mesh that creates a more laminar flow.
This allows for filtration down to 7 microns—significantly tighter than the OEM 10-micron standard—while simultaneously increasing the total air volume available to the turbocharger. The result is a more efficient combustion cycle and a faster turbo spool-up.
Why Mechanics Choose This Kit
- Enhanced Surface Area: The "Full Moulding" construction eliminates welded joints, allowing the filter to utilize the maximum possible surface area within the factory airbox for better air density.
- Industrial Durability: Unlike cheap plastic-framed filters, the rubber used by BMC is formulated to resist heat-soak and maintain a perfect seal against the airbox walls, preventing dirty air bypass.
- Washable Performance: This isn’t a disposable part. Because it uses an alloy mesh and cotton gauze, it can be cleaned and re-oiled, maintaining peak flow rates for the life of the vehicle.
Technical Specifications
| Fitment | BMW 3 Series (F30 / F31) 330d and 335d xDrive (2012-2019); 3 Series GT (F34) 330d / 335d xDrive (2014-2020); 4 Series (F32 / F33 / F36) 430d / 435d (2013-2020); 5 Series (F10 / F11) 535d and M550d (2011-2017); 5 Series GT (F07) 530d / 535d (2012-2017); 6 Series (F12 / F13) 640d and 640d Gran Coupe (F06) (2011-2018); 7 Series (F01 / F02) 730d, 740d, 750d (2011-2015); X3 (F25) xDrive30d / 35d (2011-2017); X4 (F26) xDrive30d / 35d (2014-2018); X5 (E70) M50d (2012-2013); X5 (F15) 30d, 40d, M50d (2013-2018); X6 (E71) M50d (2012-2014); X6 (F16) 30d, 40d, M50d (2014-2019); Alpina D3 / D4 / D5 / XD3 3.0 BiTurbo (2011-2018) |
| Dimensions | 149mm x 367mm panel |
| Part Number | BMC FB821/04 |
Compatibility & OEM Reference
Fits the following vehicles (BMC fitment data):
- BMW 3 Series (F30,F31,F80) 330d (258 HP) | 2012-2019
- BMW 3 Series (F30,F31,F80) 335dX (313 HP) | 2013-2019
- BMW 3 GT (F34) 330d Gran Tourismo (258 HP) | 2014-2020
- BMW 3 GT (F34) 335dx Gran Tourismo (313 HP) | 2014-2020
- BMW 4 Series (F32,F33,F36,F82) 430d (258 HP) | 2013-2020
- BMW 4 Series (F32,F33,F36,F82) 435d (313 HP) | 2013-2020
- BMW 5 Series (F10,F11,F18) 535d (313 HP) | 2011-2017
- BMW 5 Series (F10,F11,F18) M550d (381 HP) | 2012-2017
- BMW 5 GT (F07GT) 530d GranTourismo (258 HP) | 2012-2017
- BMW 5 GT (F07GT) 535d GranTourismo (313 HP) | 2012-2017
- BMW 6 Series (F12,F13) 640d (313 HP) | 2011-2018
- BMW 6 GC (F06 GC) 640 d GranCoupe (313 HP) | 2012-2018
- BMW 7 Series (F01,F02,F03,F04) 730d (258 HP) | 2012-2015
- BMW 7 Series (F01,F02,F03,F04) 730d (2011 HP) | 2011-2015
- BMW 7 Series (F01,F02,F03,F04) 740d (313 HP) | 2012-2015
- BMW 7 Series (F01,F02,F03,F04) 750d (381 HP) | 2012-2015
- BMW X3 (F25) 30dX (277 HP) | 2016-2017
- BMW X3 (F25) 35dX (313 HP) | 2011-2017
- BMW X4 (F26) 30dX (258 HP) | 2014-2018
- BMW X4 (F26) 30dX (277 HP) | 2014-2018
- BMW X4 (F26) 35dX (313 HP) | 2014-2018
- BMW X5 (E70) M50d (381 HP) | 2012-2013
- BMW X5 (F15,F85) 30d (258 HP) | 2013-2018
- BMW X5 (F15,F85) 30d (286 HP) | 2013-2018
- BMW X5 (F15,F85) 40d (313 HP) | 2013-2018
- BMW X5 (F15,F85) M50d (381 HP) | 2013-2018
- BMW X6 (E71,E72) M50dX (381 HP) | 2012-2014
- BMW X6 (F16,F86) 30d (258 HP) | 2014-2019
- BMW X6 (F16,F86) 40d (313 HP) | 2014-2019
- BMW X6 (F16,F86) M50d (381 HP) | 2014-2019
- BMW Alpina B. Bovensiepen D3 (F30/F31) 3.0 BiTurbo (350 HP) | 2014-2018
- BMW Alpina B. Bovensiepen D4 (F32/F33) 3.0 BiTurbo (349 HP) | 2014-2018
- BMW Alpina B. Bovensiepen D5 (F10/F11) D5 BITurbo (350 HP) | 2011-2016
- BMW Alpina B. Bovensiepen XD3 (F25) 3.0 BITurbo (F25) (350 HP) | 2013-2018
OEM Cross Reference (BMC): BMW 13718510239, 1371851239, 13718518111
The Performance Promise
Buy with confidence. We understand the intricacies of BMW’s diesel engineering. Our team ensures that every part we stock provides a legitimate upgrade to the driving experience. This BMC filter is a direct-fit replacement, meaning no modification to your expensive OEM airbox is required.
Common Questions
Which BMW cars does it fit?
BMC lists the N57 diesel 3 / 3 GT / 4 Series 330d-435d, 5 Series 530d-M550d, 640d and 7 Series 730d-750d, 2011-2020.
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.
Fitment
Fitment
Warranty
Warranty
