Audi S4 B7 Front Brake Caliper Wheel Brake Unit Left N/S Red 8E0615123B

Audi S4 B7 Front Brake Caliper Wheel Brake Unit Left N/S Red is an original brake system component designed for installation on the front axle on the driver's side. Thanks to its factory design, Audi ensures precise fitment, stable brake system operation, and consistency with the vehicle's stock configuration. This is a solution for users who expect reliable braking performance while maintaining the sporty character of the S4 version.

Specifications and technical data

• SKU: 8E0615123B-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0615123B
• Substitutable numbers: 8E0615123B, 8E0 615 123 B
• Location on the vehicle: Front, Left
• Part type: Brake Caliper
• Category: Calipers & Brackets

Purpose and function in the brake system

The offered caliper is a component designed for operation on the front left axle of the Audi S4 B7 generation. As part of the brake system, it is responsible for evenly pressing the brake pads against the disc, stabilizing braking force, and maintaining the proper driving line during intensive braking. The red finish emphasizes the sporty nature of the S4 model while remaining consistent with the factory styling.

Construction and advantages of the original Audi caliper

As an element from the Brake calipers and carriers group, this model was designed by Audi with a focus on proper body rigidity, temperature resistance, and compatibility with factory brake discs and pads. The original construction ensures:

• stable pad guidance within the caliper,
• proper piston operating characteristics,
• correct distribution of braking forces on the front axle,
• consistency with the vehicle's stock ABS/ESP system. This maintains the factory braking characteristics, which is important both in daily use and during dynamic driving.

Condition, installation, and fitment

The item comes from the group of original used Audi parts, which in practice means maintaining factory geometry, mounting points, and compatibility with brake lines and mounting hardware intended for the S4 B7. Installation is performed in place of the stock caliper on the front left side, without the need to modify the steering knuckle or hub construction. Before installation, a standard service procedure is recommended: inspection of working surfaces, bleeding the brake system, and verifying the condition of discs and pads. This approach allows for fully utilizing the potential of the caliper and maintaining stable braking parameters.

Why choose an original used caliper

In the case of brake system components, choosing an original used caliper is often more predictable than purchasing cheap replacements of unknown origin. The factory Audi part ensures:

• preservation of the braking characteristics designed by the manufacturer,
• compatibility with other system components,
• visual consistency with other brake elements in the S4 version. If you want to better understand how to safely use recycled parts in the brake system and how to optimize service costs, check out the article Brake calipers under the microscope – how to reduce repair costs by choosing original used parts.

Expanding the Audi brake system

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

Summary

Audi S4 B7 Front Brake Caliper Wheel Brake Unit Left N/S Red is a solution for drivers who expect the preservation of factory braking characteristics, proper fitment to the system, and consistency with the model's sporty styling. By choosing an original used part, you receive a component designed specifically for this model, which facilitates installation and allows for maintaining predictable, safe brake system operation.