Brake Caliper Audi A8 4H Rear Wheel Braking Unit Left N/S 4H0615403

Visual condition of the part

The product shows signs of use visible in the photos.

Brake Caliper Audi A8 4H Rear Wheel Braking Unit Left N/S is an original Audi braking system component designed for installation on the rear left axle of the vehicle. This used brake caliper from this series ensures factory-fit, stable braking system operation, and predictable vehicle behavior during daily use.

Specifications and technical data

• SKU: 4H0615403
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0615403
• Substitutable numbers: 4H0615403, 4H0 615 403, 4G0615123B, 4G0 615 123 B
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper is designed as a working element of the rear braking system on the left side. It is responsible for evenly pressing the brake pads against the disc, which translates into stable deceleration and proper operation of braking assistance systems. Thanks to the factory design, the correct mounting geometry and compatibility with other rear axle components are maintained.

Choosing an original Audi caliper allows for maintaining consistent braking parameters between the left and right sides, which is important for both safety and driving comfort. This solution is particularly recommended for repairs where maintaining the manufacturer's performance characteristics is a priority.

Construction and fitment for Audi A8 4H

The Brake Caliper Audi A8 4H Rear Wheel Braking Unit Left N/S from this series has been developed for the specific Audi A8 4H platform, which means correct mounting points, the appropriate piston operating range, and compatibility with factory brake discs and pads. The lack of need for modifications or adaptations shortens installation time and reduces the risk of service errors.

Thanks to the use of an original design, the proper rigidity of the caliper body is maintained, which helps reduce unwanted vibrations and ensures repeatable performance during intensive braking. This is particularly important in high-end cars such as the Audi A8, where a predictable braking system response is expected across a wide range of loads.

Benefits of using a used OEM caliper

A used component from the Brake calipers and carriers group represents a reasonable compromise between repair costs and maintaining the vehicle's factory specifications. Compared to low-budget replacements, an original dismantled caliper usually fits better within the parameters provided by the manufacturer, which facilitates subsequent diagnostics and service.

The main advantages of this solution include:

• factory fitment to the hub, carrier, and brake disc,
• maintenance of the original braking system performance characteristics,
• reduced risk of compatibility issues during installation.

For workshops and individual users, this means a more predictable repair process and a lower probability of needing to intervene in the braking system again shortly after.

Professional selection and operational safety

When selecting a used caliper for an Audi A8, it is worth paying attention to compliance with the manufacturer's markings and the vehicle placement. This model is specifically designed for the rear left side, which eliminates the risk of installation errors and helps maintain the correct distribution of braking forces on the axle.

To better prepare for purchasing second-hand components and to verify key technical aspects, it is worth using the practical tips included in the article Second-hand braking system: how to safely select discs, calipers, and ABS?. This is a helpful source of knowledge when planning comprehensive brake maintenance in premium class cars.

Expanding Audi braking system repairs

If you are planning a comprehensive repair or upgrade of the braking zone in your Audi and need other components from the same group, such as additional calipers, carriers, or mounting brackets, check out the available parts in the Audi brake calipers and carriers category.