BMW Engine Oil Filter Housing Gasket & Oil Cooler Seal Kit for N20 / N26 / N51 / N52 / N53 / N54 / N55 / S55 Engines (Replaces 11428637820 / 11427525335 / 11428637821 / 11427537293)

Permanently solve one of the most notorious oil leak failure modes in the entire modern BMW lineup with this premium oil filter housing gasket and oil cooler seal kit, manufactured from upgraded ACM (Acrylic-Acrylate Rubber) material that significantly outlasts the factory rubber seals. The oil filter housing gasket and oil cooler seals on N20, N26, N51, N52, N53, N54, N55, and S55 engines are notorious for failing as the factory rubber ages and hardens — and the consequences range from frustrating to catastrophic. When these seals deteriorate, oil leaks onto the alternator, drips onto the serpentine belt, and can cause the belt to slip, hit the crankshaft pulley, and roll into the crankshaft, leading to severe engine damage. As if that's not enough, deteriorated seals can also allow oil and coolant to mix in the engine, contaminating the cooling system, triggering the malfunction warning light, and potentially leading to engine failure. This upgraded ACM seal kit replaces the failure-prone factory components with significantly more durable material that resists hardening, cracking, and the seal failures that affect aged factory parts.

Features:

• Premium ACM (Acrylic-Acrylate Rubber) material – delivers superior heat, oil, and aging resistance compared to factory rubber seals
• Direct OE replacement design – manufactured to factory specifications matching original equipment part numbers for clean modification-free installation
• Complete kit – includes both oil filter housing gasket and oil cooler seal components for comprehensive maintenance
• Wide cross-platform compatibility – fits virtually the entire modern BMW engine lineup including N20, N26, N51, N52, N53, N54, N55, and S55 variants
• Critical preventive maintenance – addresses one of the most well-documented and damaging oil leak failure modes in the entire modern BMW platform
• Significantly upgraded durability – ACM construction outlasts factory rubber seals by a substantial margin
• Compatible with both turbocharged and naturally aspirated BMW engine variants

Specifications:

• Condition: 100% Brand New
• Type: Oil Filter Housing Gasket & Oil Cooler Seal Kit
• Material: ACM (Acrylic-Acrylate Rubber)
• Item Weight: 0.060 kg
• Quantity: Complete Seal Kit
• Position: Oil Filter Housing & Oil Cooler
• Engine Compatibility: BMW N20 / N26 / N51 / N52 / N53 / N54 / N55 / S55
• Purpose: Direct OE Replacement / Failure Prevention Upgrade

OE / Replacement Part Numbers:

• 11428637820 / 11 42 8 637 820
• 11427525335 / 11 42 7 525 335
• 11428637821 / 11 42 8 637 821
• 11427537293 / 11 42 7 537 293

Fitment:

Compatible with BMW N20, N26, N51, N52, N53, N54, N55, and S55 engines. Verify your engine code before ordering.

BMW 1 Series:

• BMW E82 / E88 128i / 135i / 135is (2008 – 2013)

BMW 3 Series:

• BMW E90 / E91 / E92 / E93 323i / 325i / 325xi / 328i / 328xi / 330i / 330xi / 335i / 335is / 335xi (2006 – 2013)
• BMW F30 / F31 / F34 320i / 320i xDrive / 328i / 328i xDrive / 335i / 335i xDrive (2012 – 2019)

BMW 4 Series:

• BMW F32 / F33 / F36 428i / 428i xDrive / 435i / 435i xDrive (2014 – 2020)

BMW 5 Series:

• BMW E60 / E61 528i / 528xi / 535i / 535xi (2004 – 2010)
• BMW E60 / E61 525i / 525xi / 530i / 530xi N52 (2006 – 2007)
• BMW F10 / F11 535i / 535i xDrive (2011 – 2016)
• BMW F10 / F11 528i / 528i xDrive N20 (2012 – 2016)

BMW 6 Series:

• BMW F12 / F13 640i (2012 – 2018)

BMW 7 Series:

• BMW F01 / F02 740i / 740Li (2009 – 2015)

BMW X Series:

• BMW E84 X1 28i / 28i xDrive / 35i xDrive (2013 – 2015)
• BMW E83 X3 3.0si N52 (2007 – 2010)
• BMW F25 X3 sDrive28i / xDrive28i / xDrive35i (2011 – 2017)
• BMW F26 X4 28i xDrive / 35i xDrive (2015 – 2018)
• BMW E70 X5 3.0si (2007 – 2013)
• BMW F15 X5 sDrive35i / xDrive35i (2014 – 2018)
• BMW E71 X6 xDrive35i (2008 – 2014)
• BMW F16 X6 sDrive35i (2015 – 2019)

BMW Z4:

• BMW E85 / E86 Z4 3.0i N52 / Z4 3.0si N52 (2003 – 2008)
• BMW E89 Z4 sDrive28i / sDrive30i (2009 – 2016)

• Compatible with BMW N20, N26, N51, N52, N53, N54, N55, and S55 engines only
• Confirm engine code before ordering

Contents:

• Oil Filter Housing Gasket
• Oil Cooler Seal Kit

Benefits:

• Permanently addresses one of the most notorious oil leak failure modes in the entire modern BMW lineup – this seal failure is universally feared in the BMW enthusiast community
• Prevents the cascade of damage that develops when seals fail – including alternator oil contamination, belt slippage, crankshaft pulley damage, and potential catastrophic engine damage from belt ingestion
• Prevents oil and coolant contamination – deteriorated seals can allow oil and antifreeze to mix, contaminating the cooling system and potentially leading to engine failure
• ACM material delivers significantly improved durability compared to factory rubber – resists hardening and cracking that develops with sustained heat cycling
• Resolves common oil leak symptoms – including engine bay oil residue, dripping onto the alternator, oil consumption, and burning oil smell from drips contacting hot exhaust
• Critical preventive maintenance for any unrebuilt BMW with N20, N26, N5x, N54, N55, or S55 engine – these seals fail predictably with age and mileage
• Significant cost savings compared to potential engine damage that can result from belt ingestion or oil/coolant cross-contamination – this kit is preventive insurance against catastrophic failure
• Wide cross-platform compatibility makes this versatile for BMW enthusiasts who manage multiple chassis or workshops servicing diverse BMW models

Symptoms of Failed Oil Filter Housing Gasket / Oil Cooler Seal:

• Oil residue on the alternator or surrounding engine bay components
• Oil dripping onto the serpentine belt area
• Burning oil smell from oil contacting hot exhaust components
• Coolant contamination with oil (milky brown coolant residue in expansion tank)
• Oil consumption without visible external leaks
• Cooling system malfunction warnings
• Triggered check engine light or service warning

Installation Notes:

• Engine compatibility verification required: Confirm your engine is one of the listed BMW N20, N26, N51, N52, N53, N54, N55, or S55 variants before ordering – this kit is not compatible with other BMW engine families
• Allow the engine to fully cool before beginning service to avoid burns from hot engine components and oil
• Drain a portion of the engine oil before disassembly – have a clean catch container ready for residual oil release
• Document the original component positioning before disassembly – take photos of the oil filter housing and oil cooler connections before removal
• Carefully remove the oil filter housing assembly – consult vehicle service documentation for proper removal procedure on your specific engine variant
• Clean all mating surfaces thoroughly before installing the new gaskets and seals – any debris, old gasket material, or oil residue will compromise the new seal
• Inspect the oil filter housing and oil cooler for any cracks, warping, or damage during installation – damaged housings should be replaced before installing new seals
• Apply a small amount of clean engine oil to the new gasket and seals before installation to ensure smooth seating and prevent damage during fitment
• Reassemble all components in proper order, following factory torque specifications using a calibrated torque wrench
• Refill the engine with manufacturer-specified oil after installation – use only the correct oil specification for your specific engine
• Inspect for oil leaks after the engine reaches operating temperature – check the oil filter housing and oil cooler areas thoroughly
• Inspect related cooling system components during installation – the thermostat, water pump, expansion tank, and coolant hoses commonly require replacement at the same service interval
• Professional installation strongly recommended unless you have experience with BMW engine oil system service procedures
• If unsure about compatibility with your specific BMW variant or engine code, contact our team with your year, model, and engine code before ordering

Warranty:

• 12-month standard warranty from date of purchase
• Contact our support team for assistance with any issues