Audi S4 B9 S5 F5 Front Brake Caliper Hosuing 375x36mm Red Right O/S 8W0615108AJ

The Audi S4 B9 S5 F5 Front Brake Caliper Hosuing 375x36mm Red Right O/S in red is an original brake system component designed for use with a 375x36 mm brake disc. Thanks to its factory Audi design, it ensures precise brake pad guidance, stable braking force, and consistency with the original performance characteristics of the sporty S4 and S5 models.

Specifications and technical data

• SKU: 8W0615108AJ
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0615108AJ
• Substitutable numbers: 8W0615108AJ, 8W0 615 108 AJ, 8W0615106ES, 8W0 615 106 ES
• Location on the vehicle: Front, Right
• Part type: Brake Caliper & Bracket
• Category: Calipers & Brackets

Application and intended use

This caliper belongs to the Brake calipers and brackets group and is dedicated to installation on the front right side of the vehicle. The design, optimized for a 375x36 mm disc, allows for efficient heat dissipation and stable load transfer during intensive braking, which is particularly important for the dynamic driving typical of the S versions.

The red finish emphasizes the sporty character of the braking system while also facilitating visual inspection of the caliper condition through the wheel rim. This is a technical and stylistic solution in one – you maintain the original brake geometry while keeping a consistent look with the factory Audi specification.

Construction and operating parameters

The front right brake caliper in this variant is designed to work with a large 375x36 mm diameter disc, which translates into a significant friction surface and high resistance to overheating. The solid body ensures proper rigidity, limiting deflection under high system pressures and thus improving braking force repeatability.

The front right mounting position means the component is factory-adapted to the steering knuckle geometry, mounting points, and brake line routing in these Audi models. As a result, the correct position of the pad relative to the disc is maintained, which minimizes the risk of uneven wear and unwanted vibrations.

Benefits of using an original used caliper

An original, used Audi brake caliper is a solution that allows you to combine cost control with maintaining the factory operating parameters of the system. Unlike many aftermarket replacements, the OEM design is engineered for a specific model and brake configuration, which facilitates installation and reduces the risk of compatibility issues.

By choosing this component, you gain:

• factory fitment to the hub, steering knuckle, and brake disc,
• consistency of braking characteristics with other system components,
• preservation of the original look of the sporty S4 / S5 version thanks to the red coating,
• the possibility of economical repair while maintaining high part quality.

More on how to safely use recycled parts and how to save on them can be found in the article: Brake calipers under the microscope – how to reduce repair costs by choosing verified used components.

Selection and installation in the Audi brake system

When selecting this caliper, it is crucial to match it to the specific version of the Audi S4 B9 or S5 F5 and ensure compatibility with the 375x36 mm disc on the front axle. The correct placement on the vehicle (front, right side) is important for both safety and durability – swapping sides or using incorrect components can lead to uneven braking and accelerated pad wear.

During installation, it is worth paying attention to:

• proper cleaning of the contact surface between the caliper and the steering knuckle,
• checking the condition of the guide pins and mounting points,
• proper bleeding of the system after connecting the brake line.

This approach allows you to fully utilize the potential of this component and maintain stable, predictable braking force in daily use and during dynamic driving.

Expanding the Audi brake system

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