BMW 1 2 3 5 Series F20 F21 F22 F30 F31 F11 Doughnut Hard Disc Universal Joint

BMW 1 2 3 5 Series F20 F21 F22 F30 F31 F11 Doughnut Hard Disc Universal Joint is a flexible drivetrain component responsible for transferring torque between the driveshaft and other assemblies while simultaneously dampening vibrations. Thanks to the use of a durable rubber flex disc, vibrations, noise, and jerking during acceleration and load changes are minimized. This practical solution improves the drivetrain operating comfort in BMW F-series vehicles.

Specifications and technical data

• SKU: 7610372
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7610372
• Substitutable numbers: 26117610372, 7610372
• Category: Other Transmission & Drivetrain

Function of the flex disc in the BMW drivetrain

The flex disc in BMW F20, F21, and F30 models acts as a flexible coupling between the driveshaft and the mating drivetrain components. The use of rubber with appropriately selected hardness allows for:

• compensation for minor axial misalignments and deviations of the shaft,
• dampening of torsional vibrations generated during load changes,
• reduction of vibration transmission to the vehicle body and interior,
• protection of other drivetrain components against shock loads.

A properly selected and functional flex disc contributes to the smoothness of the drivetrain, stability during acceleration, and the driving refinement typical of BMW vehicles.

Construction and characteristics of the rubber component

The presented driveshaft flex disc is based on a design featuring flexible rubber material working in conjunction with metal mounting bushings. This solution ensures:

• sufficient rigidity for effective torque transfer,
• flexibility that allows for the absorption of vibrations and micro-movements,
• stable shaft guidance within typical operating load ranges.

As a result, the flex disc represents a balance between mechanical durability and drivetrain operating comfort, which is particularly important in vehicles with dynamic performance characteristics.

Benefits of using an original BMW component

The original flex disc designed for the BMW F-series has been engineered for the specific geometry of the shaft, rotating masses, and the characteristics of the engines used in these models. This translates into:

• precise fitment to the factory drivetrain,
• maintenance of the proper balance of the shaft assembly,
• reduction of the risk of unwanted vibrations after installation,
• consistency with the vehicle manufacturer's original specifications.

Choosing this solution is particularly important when eliminating knocking, vibrations, and play appearing in the driveshaft area, as well as when restoring the original driving characteristics of the car.

Condition, application, and vehicle selection

The item comes from the group of original BMW parts and is offered as a used component, which allows for an economical repair of the drivetrain while maintaining compliance with factory specifications. The flex disc is intended for use in BMW vehicles from the F20, F21, and F30 families that utilize this type of flexible shaft coupling.

When selecting, it is recommended to pay attention to compatibility with the body version and drivetrain configuration of the specific vehicle, as well as matching it to the existing driveshaft. In case of doubt, it is worth comparing the design and the spacing of the mounting holes with the currently installed part.

Drivetrain expansion and additional materials

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other components from the same group, such as flexible shaft couplings, joints, or additional mounts, check the available parts in the Other BMW category.

For a comparison of solutions used in the sports designs of other brands and a better understanding of the differences in drivetrain and chassis construction, an article discussing the specifics of high-performance models may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.