Mahle 55004 Engine Cylinder Head Gasket

BMW Cylinder Head Gasket for Turbo Engines

Mahle Cylinder Head Gasket 55004 is a multi-layered steel gasket built for precise sealing in BMW turbocharged engine applications. It is specified with a 1.68 mm thickness and an 84.30 mm cylinder bore diameter, making it a direct-fit sealing component for select BMW 135i, 335i, 535i, X5, X6, and related models.

Mahle gaskets are used by OEMs and technicians worldwide for dependable engine sealing performance. This Cylinder Head Gasket line focuses on accurate fitment, stable clamping, and consistent sealing under combustion pressure.

Key Features

• Mahle Cylinder Head Gasket, part number 55004
• Multi-layered steel construction for engine sealing durability
• 1.68 mm thickness for the listed BMW applications
• 84.30 mm cylinder bore diameter
• No gasket sealant included
• Compatible with select BMW 1 Series, 3 Series, 5 Series, 6 Series, 7 Series, X1, X3, X4, X5, X6, M2, and ActiveHybrid models

Detailed Description

Mahle 55004 is an engine cylinder head gasket engineered for BMW applications that require a multi-layered steel sealing solution. The MLS design helps maintain a consistent seal between the cylinder head and engine block, which is critical in high-compression and turbocharged engines. This part number 55004 is listed across a wide range of BMW models, including 2011-2015 BMW 335i, 2011-2018 BMW X5, and 2011-2018 BMW X6, along with other 2010-2019 BMW applications.

Mahle’s Cylinder Head Gasket product line is built around OE-style sealing standards and precise dimensional control. For BMW 640i, 640i Gran Coupe, 640i xDrive, and 640i xDrive Gran Coupe applications, the notes specify a 1.20 mm head gasket and recommend cylinder head bolt replacement. Verify engine code and gasket thickness before installation to ensure the correct match for your repair.

What It Helps Fix

• Combustion gas leakage between the cylinder head and engine block
• Coolant loss caused by head gasket sealing failure
• Oil and coolant cross-contamination from a compromised seal
• Compression loss that affects engine performance
• Overheating related to head gasket failure

Installation Notes and Tips

Confirm the engine code, gasket thickness, and bore diameter before installation. Clean and inspect the cylinder head and block mating surfaces thoroughly, and follow the manufacturer’s torque sequence and angle specifications. For the BMW 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, M2, X4, X5, X6, 535i GT, 535i GT xDrive, X3, 335i GT xDrive, 435i, 435i Gran Coupe, 435i xDrive, 435i xDrive Gran Coupe, 535i, 535i xDrive, ActiveHybrid 5, M235i, M235i xDrive, 335i, 335i xDrive, 740i, 740Li, 740Li xDrive, ActiveHybrid 3, ActiveHybrid 7, X1, and 135i applications, review the fitment notes carefully before assembly. Cylinder head bolt replacement is recommended where noted in the fitment data.

Quality Assurance

Mahle is a trusted OE supplier name in engine sealing systems, and this gasket is manufactured to support accurate fitment and reliable sealing performance in the listed BMW applications. Part number 55004 is intended for direct replacement use where the cataloged specifications match the vehicle.