Audi S5 8T 4.2 FSI CAUA Automatic Gearbox Support Mount Bracket 8K0399115BK

Audi S5 8T 4.2 FSI CAUA Automatic Gearbox Support Mount Bracket is a precisely engineered drivetrain component, dedicated to working with the petrol engine and automatic transmission. It is responsible for providing stable support for the gearbox, limiting unwanted vibrations, and maintaining the correct geometry of the drivetrain, which translates into smooth operation of the drive and predictable vehicle behavior. This solution is intended for users who expect a solid, proven part with factory performance characteristics.

Specifications and technical data

• SKU: 8K0399115BK
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0399115BK
• Substitutable numbers: 8K0399115BK, 8K0 399 115 BK, 8K0399115BS, 8K0 399 115 BS, 8K0399151
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Manual Transmission

Purpose and function in the drivetrain

The automatic gearbox support mount bracket in the Audi S5 8T 4.2 FSI CAUA plays a key role in transferring loads from the transmission to the chassis. Its task is to:

• maintain the gearbox in the correct position relative to the engine and chassis,
• dampen vibrations generated by the drivetrain under various loads,
• limit gearbox movement during acceleration, engine braking, and gear changes,
• help protect other drivetrain components from excessive stress.

By maintaining the proper stiffness and flexibility, the bracket contributes to the smooth operation of the automatic transmission, reducing unpleasant jerking and noise transmitted to the cabin.

Compatibility with the petrol engine and automatic transmission

The presented component has been developed to work with the petrol engine and automatic transmission, ensuring a perfect fit for the operating characteristics of the Audi S5 8T 4.2 FSI CAUA drivetrain. Properly selected geometry and mounting points allow for maintaining:

• proper alignment of the gearbox relative to the driveshaft and half-shafts,
• stable support under the high torque typical of the 4.2 FSI unit,
• consistent operation with other drivetrain mounting components.

Such compatibility is particularly important in higher-power vehicles, where the precision of the gearbox mounting has a direct impact on the durability of the entire drivetrain system.

Characteristics of the used component

The offered bracket comes from a group of used parts, which allows for an economical restoration of the drivetrain's efficiency while maintaining the original design. In practice, this means:

• factory fitment to the mounting points on the chassis and gearbox,
• preservation of the original structural stiffness,
• possibility of installation as a replacement for a worn or damaged bracket without interfering with the vehicle's structure.

Choosing such a solution is particularly beneficial for repairs where maintaining factory geometry and operating characteristics is a priority without incurring the costs of purchasing a new part.

The importance of the correct bracket for gearbox operation

A worn or damaged bracket can lead to a number of undesirable symptoms, such as increased vibrations, noise, and even accelerated wear of engine mounts and gearbox components. Using a functional part allows you to:

• stabilize the position of the gearbox relative to the engine and chassis,
• reduce the transmission of vibrations into the vehicle interior,
• limit the risk of additional damage resulting from excessive drivetrain movement.

For vehicles such as the Audi S5 8T 4.2 FSI CAUA, where the drivetrain operates under higher loads, the correct bracket has a direct impact on driving comfort and the refinement of the automatic transmission.

Selection and technical knowledge – support with your purchase

When selecting an automatic gearbox support mount bracket, it is crucial to pay attention to compatibility with the specific engine version and transmission type. Manufacturer markings and interchangeable part numbers are helpful in verifying compatibility with a given Audi S5 8T unit. To better understand when investing in used drivetrain components is justified and what to look for when choosing them, it is worth reading the article: Used gearbox – when is it worth it and what you need to remember.

If you want to further organize the process of selecting used components and avoid mistakes related to compatibility, a guide describing practical principles for selecting parts will be helpful: how to professionally select used car parts, saving time and nerves.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Audi and need other elements from the same group, such as housings, mounts, or components working with the transmission, check the available parts in the category Audi manual gearboxes.