Audi S4 B9 S5 F5 Front Brake Caliper Hosuing 375x36mm Red Left N/S 8W0615107AJ

Audi S4 B9 S5 F5 Front Brake Caliper Hosuing 375x36mm Red Left N/S in red is an original brake system component designed for the left side of the front axle in petrol-engine vehicles. The design, adapted for a 375x36 mm brake disc, ensures efficient braking force transmission, thermal stability, and consistency with the factory brake characteristics of the S4 and S5 models.

Specifications and technical data

• SKU: 8W0615107AJ
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0615107AJ
• Substitutable numbers: 8W0615107AJ, 8W0 615 107 AJ, 8W0615105ES, 8W0 615 105 ES
• Location on the vehicle: Front, Left
• Fuel type: Petrol
• Part type: Brake Caliper & Bracket
• Color: Red
• Category: Calipers & Brackets

Purpose and compatibility

The offered caliper belongs to the Brake calipers and carriers group and has been designed specifically for the front left axle in sports versions of the Audi S4 (B9 generation) and Audi S5 (F5 generation) with petrol engines. The body geometry, mounting points, and spacing for the 375x36 mm disc are adapted to the factory brake system of these models, allowing for the maintenance of original system performance parameters.

Construction and performance parameters

You are dealing with a robust, multi-piston caliper body in red, which emphasizes the sporty character of the front axle and improves the visual clarity of the brake system behind the wheel rim. The construction, intended for use with a large 375x36 mm disc, provides an adequate working surface for the brake pad and stable heat dissipation during intensive braking.

The layout of the brake fluid flow channels and the hose connection points are optimized for uniform pad pressure against the disc, which translates into predictable braking force modulation and pedal response repeatability. The use of an original body allows for the maintenance of factory operating characteristics for assistance systems such as ABS or ESP.

Benefits of using an original used caliper

Choosing an original, used brake caliper for an Audi is a solution that allows you to balance cost control with maintaining the proper characteristics of the brake system. The body designed by the vehicle manufacturer guarantees:

• precise fitment to the steering knuckle and brake disc,
• compatibility with factory brake lines and mounting hardware,
• maintenance of the serial brake system geometry on the front axle.

As a result, installation is predictable, without the need for adaptation or modification of cooperating elements, and the vehicle maintains the correct distribution of braking force between the axles.

Application in service practice

This caliper is suitable both for the standard replacement of a damaged component and for restoring a complete, high-performance brake system in an Audi S4 B9 or S5 F5. The placement on the vehicle on the front left axle facilitates clear identification when planning service work and selecting other components, such as discs or pads of the appropriate dimensions.

In the case of brake systems, it is particularly important to use components with a known specification and origin, which helps avoid problems with uneven pad wear, vehicle pulling during braking, or improper operation of safety systems.

Technical support and parts selection

If you want to better understand how to safely use original, used brake system components and how to optimize repair costs, it is worth checking out our guide Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing proven recycled parts, where you will find practical tips on selecting and operating such components.

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

For a broader perspective on maintaining the brand's character using original components, you can also read the article Audi and pure emotion. How do used parts help maintain the brand's DNA?, which shows how properly selected elements influence the consistency of the driving experience.