BMW 1 3 Series F20 F21 F30 LCI B38 Gearbox Suspension Mounting Mount 6875904

BMW F20 F21 F30 B38 Gearbox Mount is an original BMW powertrain mounting component, designed for stable support and vibration damping of the gearbox in vehicles with a B38 engine. A used gearbox mount allows for an economical yet technically correct repair of the drivetrain, while maintaining factory performance characteristics. It's a practical solution for users who expect precise fitment to BMW's construction without the need to invest in a new component.

Specifications and technical data

• SKU: 6875904
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6875904
• Substitutable numbers: 6875904, 22316875904, EM
• Category: Other Transmission & Drivetrain

Purpose and Function of the BMW Gearbox Mount

The gearbox mount in BMW F20, F21, and F30 models with the B38 unit is responsible for the flexible connection between the gearbox and the body. Its tasks include:

• damping vibrations transferred from the powertrain to the chassis,
• stabilizing the gearbox position during acceleration, engine braking, and gear changes,
• reducing noise and vibrations felt in the cabin,
• protecting other powertrain components from excessive loads.

By using an original mount dedicated to this generation of BMW, the correct gearbox mounting geometry is maintained, which translates to proper operation of the entire drivetrain.

Benefits of Using an Original Gearbox Mount

Choosing a used, original gearbox mount for BMW F20, F21, and F30 with a B38 engine is a solution that combines economic aspects with maintaining manufacturer-specified parameters. Key advantages include:

• Factory Fitment – the component comes from the BMW line, ensuring compatibility with mounting structures and the powertrain.
• Appropriate Damping Characteristics – correctly selected stiffness and flexibility limit vibration transfer to the body.
• Stable Gearbox Operation – a properly functioning mount helps maintain the correct position of the gearbox relative to the engine and driveshaft.
• The ability to restore driving comfort in case of wear of the old mount, indicated by knocking or excessive vibrations.

For workshops and individual users, this means hassle-free installation and predictable vehicle behavior after repair.

Condition, Verification, and Practical Application

The gearbox mount offered in this listing is a component from the Other category, sourced from disassembly. This type of part should be verified before reuse for any cracks, excessive rubber wear, and play in the mounting areas. In practice, installing an original mount in place of a worn component allows for:

• reducing unwanted vibrations and noise in the cabin,
• limiting the risk of damage to other powertrain components,
• maintaining the proper operating culture of the BMW powertrain with the B38 engine.

Due to the specific construction of BMW F-series vehicles, using a dedicated gearbox mount is crucial for maintaining the stability of the entire drivetrain and proper torque transfer.

Selection and Compatibility in the BMW Powertrain

When selecting a gearbox mount for BMW F20, F21, and F30 with a B38 engine, it is crucial to rely on the OEM part number and available interchangeable numbers, which clearly identify this component in the BMW catalog. This ensures that the mount will work with the specific gearbox version and body configuration.

If necessary, it is advisable to compare the shape, arrangement of mounting holes, and type of mounting with the currently installed mount. This approach minimizes the risk of error and allows for efficient repair, especially in specialized BMW service centers.

Related Products and Technical Knowledge

If you are looking for other components from the Other category dedicated to this brand, check out our offer for other BMW parts, where you will find a wide selection of components for various models and generations.

To compare the characteristics of sports powertrains with solutions used in standard car versions, it is worth reading the article on our blog: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?. It helps to better understand the construction differences in the engine, braking, and chassis areas, which can be helpful when planning modifications or repairs on premium vehicles.