Mini R55 R56 R57 JCW John Cooper Works Rear Right O/S Wheel TRW Brake Caliper

Visual condition of the part

The product shows signs of use visible in the photos.

Mini R55 R56 R57 JCW John Cooper Works Rear Right O/S Wheel TRW Brake Caliper is an original brake system component designed for the rear axle on the right side of performance Mini models. This used brake caliper ensures factory-spec mounting geometry and proper brake pad guidance, resulting in stable and predictable braking. It is a solution for drivers who want to maintain consistency with the factory brake system design while optimizing maintenance costs.

Specifications and technical data

• SKU: 6784646
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 6784646
• Substitutable numbers: 6784646, 34216784646
• Location on the vehicle: Rear, Right
• Category: Brake Disc Rotors

Purpose and function in the brake system

The presented brake caliper is dedicated for installation on the rear, right side of the vehicle, where it is responsible for applying even pressure from the brake pads to the disc during braking. A correctly selected caliper in this position is crucial for:

• maintaining vehicle stability during emergency braking,
• even distribution of braking force between the left and right sides of the axle,
• proper interaction with ABS/ESP systems.

The version designed for JCW models allows for maintaining braking characteristics in line with the manufacturer's specifications, which is particularly important in high-performance vehicles.

Benefits of using an original Mini brake caliper

Using an original brake caliper in a Mini provides a range of practical service and operational benefits. A component designed by the vehicle manufacturer ensures:

• precise fitment to the carrier and hub, without the need for modifications or adapters,
• compatibility with factory brake lines and mounting hardware,
• proper piston and guide pin operation, which contributes to even brake pad wear,
• consistency with the brake system parameters intended for JCW versions.

As a result, installation is straightforward, and the brake system retains its factory performance characteristics after replacement, which is important for both daily driving and dynamic use.

Characteristics of the used component

The offered brake caliper comes from a used vehicle, allowing you to combine original build quality with a more favorable cost level compared to new parts. A used brake system component is a good solution in situations where:

• a quick replacement of a damaged rear right brake caliper is necessary,
• maintaining the original Mini brake system specification is a priority,
• optimizing repair budget while maintaining an appropriate level of safety is important.

Before installation, a standard service procedure is recommended, including checking the condition of the guide pins, seals, and bleeding the system after the work is completed.

Application in service practice

The Mini R55 R56 R57 JCW John Cooper Works Rear Right O/S Wheel TRW Brake Caliper is suitable for both professional workshops and knowledgeable owners servicing their own cars. In service practice, such a component allows you to:

• restore proper operation of the rear right brake circuit after a failure or caliper seizure,
• maintain compatibility with existing brake discs and pads,
• keep braking parameters consistent between the left and right sides of the rear axle.

As a result, this is a part that supports safe vehicle operation and reduces the risk of uneven braking or vehicle pulling during heavy deceleration.

If you are planning a comprehensive repair or upgrade of the braking area in your Mini and need other components from the same group, such as discs, pads, or brake lines, check out the available parts in the Mini brake discs category.

To better understand how to safely use used brake system components and how they can help reduce service costs, it is worth reading our guide: Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing verified recycled parts.