BMW F20 F21 F30 F31 Brake Caliper Housing Carrier 11/290 Rear Left N/S

BMW F20 F21 F30 F31 Brake Caliper Housing 11/290 Rear Left is an original part from the Brake Calipers and Brackets group, designed for the rear left axle of selected BMW F-series models. The used, factory housing ensures proper caliper mounting geometry, stable brake system operation, and maintains manufacturer-specified parameters. This is a solution for users who want to restore correct brake function while preserving the OEM construction.

Specifications and technical data

• SKU: 6850851
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6850851
• Substitutable numbers: 6850851, 34216850851
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Intended Use and Compatibility with BMW Models

The caliper housing is designed for installation on the rear left side of the vehicle, in the braking system of BMW F-series models with F20, F21, F30, and F31 body types. The construction matches factory mounting points, which facilitates installation and reduces the risk of caliper alignment issues relative to the brake disc. By maintaining the original geometry, proper pad guidance and even wear of friction components are possible.

Technical Characteristics of the Caliper Housing

The brake caliper housing provides a rigid base for the moving parts of the caliper and brake pads. This BMW model features a design adapted for use with a disc brake system on the rear axle, with appropriately selected working diameter and mounting spacing. The element ensures:

• stable pad guidance relative to the disc,
• adequate rigidity under braking loads,
• compatibility with factory brackets and mounting bolts,
• the ability to work with standard brake system hardware.

By retaining the original design, the housing allows for seamless integration with the vehicle's existing hydraulic system and electronics, without the need for modifications to other components.

Benefits of Using an Original Caliper Housing

Using a factory caliper housing in BMW F-series models translates into a number of practical operational benefits. The most important include:

• secure fit to the hub and steering knuckle, which reduces the risk of vibrations and uneven braking,
• maintenance of standard brake system operating parameters,
• easier diagnostics and servicing in the future, due to compliance with manufacturer documentation,
• the ability to use standard pads and discs intended for the specific model.

A used caliper housing is a sensible choice for repairs where the combination of OEM functionality with cost control is crucial, while maintaining an appropriate level of safety.

Professional Installation and Operation

Due to the importance of the braking system for driving safety, the installation of the caliper housing should be performed by a qualified service center, using appropriate torque values and system bleeding procedures. It is recommended to simultaneously check the condition of the discs, pads, flexible hoses, and caliper guides to achieve a cohesive service effect after replacing the housing. After installation, a test drive is recommended to check braking effectiveness and any potential noises from the rear axle.

If you are planning a comprehensive repair or upgrade of the braking area in your BMW and need other parts from the same group, such as additional housings, brackets, or caliper supports, check the available parts in the BMW Brake Calipers and Brackets category.

Technical Support and Selection of Used Brake Components

When selecting used brake system components, it is advisable to follow proven procedures for assessing their technical condition and compatibility with a specific vehicle version. Detailed guidance on how to safely choose discs, calipers, and related parts can be found in the article: Second-Hand Braking Systems: How to Safely Choose Discs, Calipers, and ABS?. Additionally, if you want to better understand the importance of original components in terms of durability and safety, the entry OEM Quality and Safety Guarantee – Why Used Original Car Parts Are the Best Choice for Your Car? will be helpful.