Mini F55 F56 Rear Brake Caliper Brake Unit Housing Right O/S 36/10/259 6860558

Mini F55 F56 Rear Brake Caliper Brake Unit Housing Right O/S is an original BMW Group brake system component designed for installation on the rear right axle. This used brake caliper from this series is a solution for users seeking factory compatibility and stable braking performance at reasonable maintenance costs. Thanks to its specific OEM design, this component allows for seamless integration with the vehicle's existing hydraulic and mechanical system.

Specifications and technical data

• SKU: 6860558
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6860558
• Substitutable numbers: 34216860558, 6860558, 34216865928, 6865928
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Purpose and vehicle placement

The presented brake caliper is designed for use on the rear right side of BMW Group Mini F55/F56 series vehicles. It is responsible for pressing the brake pads against the disc on the rear axle, stabilizing braking force and the distribution of braking torque between the front and rear of the car. Proper fitment to the specific mounting location reduces the risk of uneven pad wear, disc overheating, and unwanted vibrations during braking.

Technical and design characteristics

The caliper belongs to the Brake calipers and carriers group, meaning it is a working element of the friction system, operating in conjunction with the disc, pads, and brake lines. The OEM design ensures:

• properly calibrated piston pressure force against the disc,
• compatibility with factory mounting points on the steering knuckle and carrier,
• correct operating geometry relative to the disc and wheel hub,
• maintenance of standard performance parameters for assistance systems (ABS, ESP).

As a result, the caliper can be used as a replacement part during standard maintenance without the need for brake system modifications or interference with the suspension design.

Benefits of using an original, pre-owned caliper

Choosing a used brake caliper from the BMW Group allows for significant repair cost savings compared to new parts, while maintaining the original manufacturer specifications. This is particularly important for modern Mini models, where the brake system is precisely tuned to the vehicle's electronics. An original component from the same product line minimizes the risk of fitment issues, leaks, or improper piston operation.

A used caliper can also be a good starting point for potential refurbishment if the workshop plans such action as part of a long-term vehicle maintenance plan. Preserving the factory housing and geometry facilitates the service process and subsequent technical condition checks.

Professional use in service and repairs

The Mini F55 F56 Rear Brake Caliper Brake Unit Housing Right O/S is suitable for both independent workshops and services specializing in the BMW/Mini brand. It can be used for:

• standard replacement of a worn or damaged caliper,
• post-collision repairs involving the rear axle,
• comprehensive brake system maintenance, including disc and pad replacement,
• restoring full system functionality after the vehicle has been stationary for an extended period.

Due to the original design, installation is predictable for the mechanic, which reduces labor time and limits the risk of needing additional modifications.

Expanding the brake system in BMW/Mini

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

How to safely use pre-owned brake calipers

When choosing a used caliper, it is worth paying attention to compatibility with the specific vehicle model, placement on the vehicle, and the condition of the working elements. A good practice is to combine the caliper installation with a check of the brake lines, system bleeding, and an assessment of the condition of the discs and pads. This allows for a consistent service result and avoids the need for re-intervention in the system in the near future.

To better understand how to optimally select used brake system components and how to reduce repair costs, it is worth reading the guide: Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing verified recycled parts.