Audi RS4 B8 Brake Caliper Rear Right O/S Wheel Braking Unit RS 8K0615404D

Audi RS4 B8 Brake Caliper Rear Right O/S Wheel Braking Unit is an original braking system component from the Brake calipers and brackets group, designed for installation on the rear right axle. This solution is dedicated to demanding users who expect stable, predictable braking and the preservation of the factory performance characteristics of the braking system in Audi RS series models.

Specifications and technical data

• SKU: 8K0615404D
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0615404D
• Substitutable numbers: 8K0615404D, 8K0 615 404 D
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Purpose and vehicle positioning

The presented caliper is designed to operate on the rear right side of the vehicle, which is crucial for the correct distribution of braking force and cooperation with other system components. Proper positioning ensures the correct geometry of the caliper relative to the disc, which translates into even pad wear and stable braking performance across the entire speed range.

This element is part of the factory Audi braking system architecture, ensuring compatibility with stock mounts, lines, and other rear axle components. For the user, this means predictable installation and no need for modifications to the suspension or wheel hub construction.

Technical and functional characteristics

As an element from the Brake calipers and brackets category, this caliper is responsible for the precise guidance of brake pads relative to the disc and the effective transfer of hydraulic pressure into clamping force. The design intended for the RS version ensures high resistance to thermal loads and operational repeatability during dynamic driving.

Key functional features of this model include:

• stable brake pad guidance throughout the entire operating range of the system,
• properly selected body stiffness, limiting deformation under high pressure,
• mounting geometry designed for Audi, facilitating service and periodic inspections,
• compatibility with the factory rear axle hydraulic system.

This type of caliper is particularly valued in high-performance cars, where braking force repeatability and predictable vehicle behavior during intensive use are essential.

Product condition and practical application

The offered caliper is a used original part, which in practice means maintaining the factory design specifications while offering an attractive cost-to-quality ratio. For many users and workshops specializing in Audi service, this is a reasonable choice for post-accident repairs, rear axle regeneration, or restoring full braking system efficiency after intensive use.

Replacing the rear right caliper with an element consistent with the factory design allows you to:

• restore even brake operation on both wheels of the rear axle,
• maintain proper cooperation with the vehicle's safety systems,
• reduce the risk of uneven pad and disc wear,
• maintain the braking characteristics intended by the manufacturer.

Selection, safety, and technical support

When selecting a used caliper for an Audi, it is particularly important to verify compatibility with the specific vehicle version and assess the technical condition of the element before installation. The correct choice of component has a direct impact on driving safety, which is why it is worth using reliable sources and proven inspection procedures.

If you want to go through the process of evaluating and selecting used braking system components step by step, the following guide will be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?. You will find a practical checklist there that will facilitate an informed choice of parts based on technical aspects and safety.

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

For those thinking about more advanced vehicle modifications, including changes to the braking system as part of broader tuning, a valuable source of knowledge may be the article The best used parts for tuning your car, which discusses a practical approach to using used components in modernization projects.