BMW 1 3 Series F20 F21 F30 F31 Rear Right O/S Brake Caliper Housing Carrier

BMW F20 F21 F30 F31 Rear Right Brake Caliper is an original part from the brake calipers and brackets category, designed for installation on the rear right axle of the vehicle. This used caliper is a functional service solution for owners of BMW 1 and 3 Series vehicles who wish to restore proper brake system operation while maintaining the factory design. It is a practical choice for drivers who value compliance with manufacturer solutions and stable braking performance.

Specifications and technical data

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

Vehicle Application and Placement

The presented brake caliper is dedicated for installation on the rear right side of BMW F20, F21, F30, and F31 series vehicles. It is responsible for pressing the pads against the disc on this axle, which directly impacts braking stability, especially during:

• intense deceleration with a loaded trunk,
• emergency braking on a straight and in a corner,
• operation of driving stability systems that utilize the rear brakes.

Thanks to its precise fit for the specific mounting location, the caliper works in conjunction with the vehicle's factory suspension geometry and standard BMW brake system components.

Technical Characteristics and Compatibility

As a BMW branded component, the caliper has been designed according to manufacturer requirements regarding clamping force, piston travel, and compatibility with standard brake discs and pads. The design is intended for integration with the factory hydraulic system, which allows for:

• consistent operation with the vehicle's safety systems,
• proper distribution of braking force between the front and rear axles,
• appropriate brake pedal response characteristics.

The presence of dedicated part numbers and interchangeable numbers (visible in the technical specifications) facilitates verification of compatibility with the specific engine and equipment version of the car.

Condition, Origin, and Service Application

The caliper is used, making it a sensible alternative to new components for routine maintenance or after mechanical damage. Such disassembled parts are often chosen in situations where:

• the original caliper has seized or become leaky,
• the caliper bracket or body has suffered mechanical damage,
• a quick replacement is necessary while maintaining factory specifications.

Choosing an original BMW caliper helps maintain predictable vehicle behavior during braking and reduces the risk of fitting issues with the hub, disc, and brake lines.

Benefits of Installing an Original BMW Caliper

Installing this caliper on the rear right axle allows for the restoration of proper brake system operation without altering the vehicle's construction. Key benefits include:

• factory fitment for the BMW F20, F21, F30, F31 brake system,
• maintenance of standard braking characteristics and integration with vehicle electronics,
• the ability to use standard discs and pads specified by the manufacturer.

For workshops and individual users, this means efficient installation and reduced risk of dimensional incompatibility or brake bleeding problems.

How to Choose a Used Brake Caliper and What to Look For

When choosing a used brake caliper, it is advisable to verify part number compatibility, vehicle placement, and body type. It may be helpful to consult the practical tips provided in the article: Second-hand braking systems – how to safely choose discs, calipers, and ABS?. This is a structured checklist that facilitates the assessment of component condition and minimizes the risk of an incorrect purchase.

Other BMW Brake Calipers and Brackets

If you are also looking for other BMW brake calipers and brackets for your car, check out the available solutions in the BMW brake calipers and brackets category. This will allow you to select complete sets for an axle or the entire front and rear axle based on parts that comply with the manufacturer's factory specifications.