BMW F20 F21 F30 F31 Rear Right O/S Brake Caliper Housing Carrier 20/300

BMW F20 F21 F30 F31 Rear Right O/S Brake Caliper Housing Carrier is an original BMW braking system component, designed for installation on the rear right axle of the vehicle. Thanks to its factory design, it ensures proper brake pad guidance, stable disc pressure, and predictable braking characteristics. It is a practical solution for users looking for a proven, used brake caliper instead of replacements of unknown origin.

Specifications and technical data

• SKU: 6850858-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6850858
• Substitutable numbers: 34216850858, 6850858, 34216850860, 6850860
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Purpose and compatibility with BMW

The presented brake caliper has been designed specifically for BMW F-series platforms, which translates into correct positioning relative to the disc and compatibility with factory braking equipment. The vehicle placement, defined as rear – right side, allows for clear identification of its application when planning repairs or replacing a single component of the system.

By maintaining the original geometry of the mounts and guides, the caliper works with the stock carriers, brake pads, and brake lines intended for this axle. This is important from a safety perspective, as the braking system operates within the parameters established by the vehicle manufacturer.

Technical and functional characteristics

As an element from the Brake calipers and carriers group, the product is responsible for generating the clamping force of the pads against the disc and stably maintaining them in the correct operating position. The caliper construction is adapted to operate in the demanding temperature and mechanical conditions typical for the rear axle of BMW cars.

Key functional features of this component include:

• factory fitment for the BMW F-series braking system,
• maintenance of proper axial alignment relative to the brake disc,
• compatibility with stock accompanying components (pads, carrier, line),
• construction prepared for long-term operation in road conditions.

Thanks to this, the caliper can be used both for standard replacement of a worn-out part and for post-accident repairs, where restoring the factory geometry of the braking system is required.

Condition, origin, and benefits of choosing a used part

The offered brake caliper comes from the segment of original, used BMW components. This type of solution is often chosen by conscious users who want to maintain factory quality and fitment while optimizing service costs. Compared to cheap replacements, an original recycled caliper usually fits better into the operating parameters of the entire system, which is significant for braking stability and even pad wear.

Before installation, a standard service procedure is recommended – verification of the operating condition, seals, guides, and mating surfaces, in accordance with the vehicle manufacturer's guidelines or good workshop practices. Such an approach allows for maximizing the potential of the used part and limiting the risk of improper system operation.

Application in braking system repairs

This brake caliper will prove useful in situations where it is necessary to replace a single component of the rear axle on the right side – for example, after a mechanism seizure, mechanical damage, or uneven pad wear. Thanks to the preservation of the original design, it is possible to restore the correct operation of the system without interfering with other components, provided their condition allows for it.

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

Safe selection of used braking components

When choosing a used brake caliper, it is worth being guided not only by the fitment to the model but also by the procedure for verifying the technical condition. It may be helpful to use practical tips regarding the assessment of wear, inspection of operating surfaces, and the principles of combining used calipers with new pads and discs. A detailed checklist can be found in the article "Second-hand braking system: how to safely select discs, calipers, and ABS?", which discusses step-by-step how to responsibly approach the purchase of braking components from the secondary market.

If you want to further deepen your knowledge on how to reduce repair costs while maintaining an appropriate level of safety, it is also worth reading the guide "Brake calipers under the microscope: How to effectively reduce braking system repair costs by choosing proven recycled parts", which describes a practical approach to selecting original used calipers.

Summary

BMW F20 F21 F30 F31 Rear Right O/S Brake Caliper Housing Carrier is a functional solution for drivers and workshops that want to restore the correct operation of the rear braking system using an original component. Proper fitment to BMW platforms, factory mounting geometry, and the ability to work with stock elements make it a reasonable choice for repairs and service of vehicles of this brand.