Brake Caliper Audi A8 D4 Rear Wheel Braking Unit Right O/S 4H0615404

Visual condition of the part

The product shows signs of use visible in the photos.

Brake Caliper Audi A8 D4 Rear Wheel Braking Unit Right O/S is an original component from the Brake calipers and carriers group, designed for operation in the rear, right section of the braking system. This used Audi brand component allows for maintaining factory braking characteristics, proper pad guidance on the disc, and stable operation of the entire system.

Specifications and technical data

• SKU: 4H0615404
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0615404
• Substitutable numbers: 4H0615404, 4H0 615 404, 4G0615124B, 4G0 615 124 B
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper is designed for installation on the rear, right axle of the vehicle, where it is responsible for evenly pressing the pads against the disc and maintaining stable operating pressure. As an original Audi part, it maintains the correct mounting geometry, which translates into proper alignment relative to the disc and predictable behavior during emergency braking and daily use.

Thanks to its factory design, the caliper works with the stock brake master cylinder, lines, and other rear axle components, reducing the risk of bleeding issues or uneven pad wear.

Benefits of using an original Audi caliper

Using an original caliper in an Audi A8 D4 provides a number of practical technical advantages:

• maintaining factory braking force characteristics on the rear right axle,
• proper fitment to the carrier, hub, and brake disc,
• consistency with the stock brake system hydraulics,
• reduction of the risk of vibrations, squealing, and uneven pad wear.

For users who expect predictable vehicle behavior, especially in a premium class car such as the Audi A8 D4, choosing this component is a safe and technically sound solution.

Condition, verification, and selection of parts

The offered caliper is a used part, which in practice means the possibility of an economical repair of the braking system while maintaining the original design. Before installation, a standard service procedure is recommended: inspection of working surfaces, guide pins, seals, and potential replacement of wear-and-tear items in accordance with the vehicle manufacturer's guidelines.

To properly match the caliper to a specific Audi A8 D4 configuration, it is worth verifying compatibility with the OEM part number and available interchangeable numbers in the specification tab. This allows you to avoid installation problems and ensures full compatibility with the given body version and braking system.

If you want to check step-by-step what to look for when buying used brake components, you can find useful information in the article: Second-hand braking system: how to safely choose discs, calipers, and ABS?.

Comprehensive service of the Audi braking zone

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

Summary

Brake Caliper Audi A8 D4 Rear Wheel Braking Unit Right O/S is a technically matched, original braking system component designed for operation on the rear right axle of the vehicle. This used component allows for maintaining factory braking parameters, proper pad guidance, and consistency with other rear axle sub-assemblies. It is a reasonable choice for drivers who want to restore the efficiency of the braking system while maintaining the original Audi design.