VW Golf Mk8 GTI Brake Caliper Servomotor Rear Right O/S 5WA615406A

The VW Golf Mk8 GTI Rear Right Brake Caliper Actuator is an original Volkswagen brake system component designed for the rear right axle of the vehicle. Thanks to its factory design, it ensures proper cooperation with the caliper, stable operating pressure, and predictable brake response, which translates to safe and repeatable system operation in daily use.

Specifications and technical data

• SKU: 5WA615406A
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 5WA615406A
• Substitutable numbers: 5WA615406A, 5WA 615 406 A, 5WA998281A, 5WA 998 281 A
• Location on the vehicle: Rear, Right
• Category: Brake Servos

Intended Use and Function in the Braking System

The brake caliper actuator in the Golf Mk8 GTI model is responsible for precisely transferring control force to the caliper, enabling effective pressing of the pads against the disc. This component operates in a demanding environment – near the wheel, exposed to temperature changes, moisture, and contaminants – which is why using an original part is crucial for stable braking performance.

The presented actuator is designed for installation on the rear right side of the vehicle, eliminating the risk of errors in part selection and simplifying service planning. Proper fitting to the specific vehicle position helps maintain the symmetry of the braking system's operation and correct interaction with the vehicle's electronics.

Construction and Fit for VW Golf Mk8 GTI

The original brake caliper actuator for the GTI version has been designed with dynamic driving in mind, characteristic of this model. The component's construction is optimized for:

• stable generation of braking force across the full range of loads,
• proper cooperation with the rear caliper and brake disc,
• maintaining adequate system rigidity during multiple braking cycles.

Thanks to its factory origin, the actuator retains the correct mounting points and geometry, which facilitates installation and reduces the need for additional modifications. This is particularly important in modern designs where the braking system is closely linked to safety and stability control systems.

Brake Boosters and Proportioning Valves Category – Role of the Actuator

This component belongs to the Brake Boosters and Proportioning Valves group, which are components responsible for assisting and modulating braking force. In practice, this means the actuator is part of a chain of elements that determine how quickly and how strongly the caliper responds to the control signal. A properly functioning actuator helps maintain:

• even distribution of braking force between axles,
• vehicle stability during sudden braking,
• consistent brake pedal feel under various road conditions.

For the user, this translates to more predictable vehicle behavior, which is especially important in a high-performance car like the Golf Mk8 GTI.

Used Condition and Service Application

The offered actuator is from the aftermarket and is a used part, allowing for economical brake system repair while maintaining original manufacturer specifications. This type of component is a good choice in situations where:

• the existing actuator has worn out or suffered mechanical damage,
• the part needs replacement after work on the rear brake caliper,
• you want to restore factory braking parameters after modifications or repairs.

Using an original, used part helps maintain the structural integrity of the system, which is important for both safety and subsequent service diagnostics.

Fitment, Identification, and Technical Support

The actuator is dedicated to Volkswagen vehicles, and its identification is based on the OEM part number and interchangeable numbers, visible in the technical specifications section. If you have any doubts before purchasing, it is advisable to compare the markings with your vehicle's documentation or consult a mechanic to confirm full compatibility with your specific equipment version.

If you are planning a comprehensive repair or upgrade of the braking area in your Volkswagen and need other parts from the same group, such as a brake booster, proportioning valve, or additional assistance modules, check the available parts in the Volkswagen Brake Boosters and Proportioning Valves category.

For users who are simultaneously servicing other vehicle systems, practical tips on selecting and operating comfort components may also be useful. In this regard, it is worth familiarizing yourself with the guide Air Conditioning and Heating – Part Selection and Maintenance for Year-Round Comfort, which discusses, among other things, the principles of selecting used OEM components and good service practices.