Audi A4 B8 S5 8T Rear Differential Servomotor Unit 0BF598074

Audi A4 B8 S5 8T Rear Differential Actuator Motor is a specialized drivetrain component designed for the rear axle, responsible for precise differential control in select Audi models. Thanks to its construction compliant with the Audi OE standard, the actuator motor ensures proper integration with the vehicle's factory electronics and stable torque transfer. A used component allows for a technically correct repair without the need to invest in a new part.

Specifications and technical data

• SKU: 0BF598074-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BF598074
• Substitutable numbers: 0BF598074, 0BF 598 074
• Location on the vehicle: Rear
• Part type: Actuator
• Category: Additional Differential Parts

Purpose and Function in the Drivetrain

The rear differential actuator motor in Audi is responsible for controlling the operation of the rear axle differential mechanism, which affects the power distribution and vehicle stability under various road conditions. In models such as the A4 B8 or S5 8T, this component works with traction control and stability systems, supporting smooth responses to changes in grip.

Its placement in the rear differential area means the actuator motor operates in a demanding environment – it is exposed to temperature changes, vibrations, and mechanical loads. A properly selected, original component helps maintain correct drivetrain operation, reduce unwanted jerks, and ensure predictable vehicle behavior during acceleration and cornering.

Benefits of Using an Original Audi Actuator Motor

Using an actuator motor from the Other Differential Parts group, dedicated to Audi, helps maintain the structural integrity of the entire system. The original mounting geometry and correct electrical and mechanical parameters facilitate installation and integration with the vehicle's existing system.

• Compatibility with factory vehicle controllers and software.
• Proper fit for the rear differential without modifications.
• Ability to use existing wiring harnesses and mounting points.

This allows the actuator motor to be used for both routine repairs and more extensive service work related to the drivetrain.

Characteristics of a Used Component

The presented actuator motor is a used part, which allows for optimizing repair costs while maintaining compliance with the factory Audi specification. Such elements are particularly valued for vehicles used intensively, where both correct system operation and economical selection of replacement parts are important.

When choosing a used rear differential actuator motor, it is worth paying attention to:

• compatibility with the specific vehicle model version,
• fit for the type of differential installed in the car,
• correct placement on the vehicle – in this case, in the rear axle area.

Application in Service and Tuning

The rear differential actuator motor is an essential component for any work related to differential regeneration or replacement, as well as for drivetrain modifications. In high-performance vehicles, such as the S5 versions, a functional actuator motor is crucial for consistent vehicle behavior during dynamic driving.

If you are considering more extensive vehicle modifications and want to better understand how the selection of used components affects performance, it is worth consulting a tuning guide – you will find practical tips in the article How to Increase Engine Power: A Practical Guide to Engine Tuning with Used Parts, which will help you plan your work safely and consciously.

Additionally, when choosing drivetrain components, a specialized guide on differentials and accessories may be helpful – you can find more information in the material Second-Hand Differentials – What You Should Know About Used Differentials, Sensors, and Drivetrain Systems, which discusses aspects such as technical condition assessment and typical signs of wear.

Repair Extension – Related Audi Components

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Audi and need other components from the same group, such as additional actuator motors, differential housings, or mounting elements, check the available parts in the Other Audi Differential Parts category.

A well-chosen set of components from the same product group facilitates maintaining the technical consistency of the entire system, reduces the risk of compatibility issues, and allows for more predictable vehicle behavior after the repair is completed.