Audi RS4 B8 Gearbox Mount Transmission Support Bracket Holder 8K0399263BF

The Audi RS4 B8 Gearbox Mount Transmission Support Bracket Holder is an original drivetrain component from the Engine Mounts group, designed for stable transmission support in the sporty Audi RS4 B8 version. This used OEM part ensures proper load transfer, reduces unwanted vibrations, and supports precise drivetrain operation under demanding conditions.

Specifications and technical data

• SKU: 8K0399263BF
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0399263BF
• Substitutable numbers: 8K0399263BF, 8K0 399 263 BF
• Category: Engine Mounts

Purpose and Technical Function

This gearbox mount bracket plays a crucial role in stabilizing the Audi RS4 B8 drivetrain. It is responsible for:

• maintaining the correct position of the gearbox relative to the body and engine,
• controlled transfer of longitudinal and transverse forces during acceleration and engine braking,
• damping vibrations and reducing their transfer to the car body,
• preserving the correct drivetrain geometry during dynamic driving.

This ensures the drivetrain operates under stable conditions, contributing to a refined driving experience and precise gear changes.

Construction and Fitment for Audi RS4 B8

The bracket was designed by Audi as a component structurally tailored to the RS4 B8 chassis architecture. This means:

• factory mounting points to the body and gearbox,
• compatibility with the original Engine Mounts system and other supporting elements,
• retention of the manufacturer's specified stiffness and mounting characteristics.

This solution allows for installation without structural modifications, maintaining the factory engineering specifications for safety and durability.

Condition, Service Application, and Benefits of Replacement

The offered part is in Used condition, meaning it comes from a dismantled vehicle and can be an attractive cost-effective alternative to a new OEM part. Replacing a worn or damaged gearbox mount bracket is particularly recommended when:

• excessive vibrations are felt in the cabin during acceleration or gear changes,
• clunks and disturbing noises occur in the center tunnel area,
• drivetrain precision deteriorates during dynamic driving.

Choosing an original component from the Engine Mounts group helps restore predictable drivetrain behavior, improve driving comfort, and reduce the risk of secondary damage to other drivetrain mounting components.

Integration with Other Drivetrain Components

The gearbox mount bracket works in conjunction with other engine and gearbox support elements, forming a cohesive support system. For comprehensive servicing, it is advisable to check:

• the condition of other mounts within the drivetrain assembly,
• the stiffness and absence of play at connection points to the body,
• the overall condition of rubber-metal components in the drive area.

This service approach helps maintain drivetrain stability at a level close to factory specifications, which is particularly important for high-performance vehicles like the RS4 B8.

Related Categories and Technical Materials

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as additional mounts, brackets, or vibration damping elements, check the available parts in the Audi Engine Mounts category.

To better understand the impact of mounting components and accessories on engine running culture and performance, an article describing how properly selected components restore the efficiency of a diesel engine may be helpful. You can find it here: Second Life for the Mercedes OM642 Engine – How Injectors and Turbo Restore Power to the 3.0 V6 CDI.