Audi A4 B9 A5 F5 Rear Electric Brake Caliper Bracket Housing Left N/S 8W0615403A

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A4 B9 A5 F5 Rear Electric Brake Caliper Bracket Housing Left N/S is an original braking system component from the Brake calipers and brackets group, designed for installation on the rear left axle of the vehicle. Thanks to its factory origin, it ensures correct mounting geometry, stable piston operation, and predictable braking system performance. This is a practical solution for users who want to maintain the structural integrity of the braking system in their Audi A4 B9 and A5 F5 models.

Specifications and technical data

• SKU: 8W0615403A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0615403A
• Substitutable numbers: 8W0615403A, 8W0 615 403 A
• Location on the vehicle: Rear, Left
• Part type: Brake Caliper
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper operates at the rear of the vehicle on the left side, responsible for evenly pressing the brake pads against the disc and stabilizing braking force on the axle. Proper positioning on the vehicle allows for maintaining the correct distribution of braking forces, which translates into predictable vehicle behavior during heavy braking, even when the trunk is loaded or when driving with passengers.

Choosing an original caliper dedicated to specific Audi models reduces the risk of fitment issues, leaks, or uneven piston operation. This is particularly important in modern braking systems, where mounting geometry and operating parameters are strictly linked to the vehicle's electronics.

Benefits of using an original Audi caliper

Using a factory caliper in an Audi A4 B9 or A5 F5 allows for consistency with the other components of the braking system. This means:

• correct guidance of brake pads and stable pressure on the disc,
• proper cooperation with the vehicle's rear axle,
• reduced risk of uneven wear of pads and discs,
• easier diagnostics and service in the future.

For the user, this means more predictable braking, better vehicle control, and the ability to keep the system in a configuration close to the factory standard. For Audi A4 B9 and A5 F5 class vehicles, this is significant for both driving comfort and the vehicle's resale value.

Product characteristics and installation

The offered component comes from the Brake calipers and brackets group, which means it has been designed to handle the loads characteristic of the rear axle and to work with factory brake discs and pads. The design of the caliper allows for its installation in place of the factory component without the need to modify the mounts on the rear beam or change the brake line routing.

The product is intended for Audi vehicles, which facilitates part selection based on the manufacturer's specifications. During replacement, it is recommended to simultaneously check the condition of the discs, pads, and flexible hoses to fully utilize the potential of the newly installed caliper and avoid uneven system operation.

Why consider a used brake caliper

Choosing a used brake caliper is a reasonable compromise between costs and maintaining the vehicle's original specifications. This type of solution allows for significantly lower repair expenses while maintaining a design consistent with Audi's factory standards. This is particularly beneficial in the case of comprehensive work on the rear axle, when more than one system component is being replaced.

To better plan your repair and make an informed choice regarding reclaimed parts, it is worth checking out the guide on our blog: Brake calipers under the microscope – how to reduce repair costs by choosing verified used parts. The article explains what to look for when selecting calipers and how to safely use original used parts.

Expanding the Audi braking system

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, mounting brackets, or guide supports, check out the available parts in the Audi brake calipers and brackets category.

By using components from the same product group, you can maintain the technical consistency of the entire system, which facilitates future service and limits the risk of compatibility issues. This is especially important in modern Audi models, where the braking system is integrally linked to safety systems and driving assistants.