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

Brake Caliper BMW F20 F21 F30 F31 Rear Left N/S Brake Housing Carrier is an original component from the Brake calipers and carriers group, designed for installation on the rear left axle in selected BMW F-series models. It serves as a solid foundation for maintenance, replacement, or refurbishment of the braking system, allowing for the preservation of factory braking characteristics and compatibility with other components.

Specifications and technical data

• SKU: 6850851-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6850851
• Substitutable numbers: 34216850851, 6850851, 34116850647, 6850647
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and fitment for BMW F-series

The presented brake housing carrier has been designed for the BMW F platform, specifically for the F20, F21, F30, and F31 models. The placement on the vehicle is the rear left side, which is crucial when selecting parts for a specific wheel and helps avoid installation issues. Using an original BMW design promotes the maintenance of the correct caliper geometry relative to the disc, and thus the stable operation of the entire braking system.

Technical characteristics of the brake housing carrier

The brake housing carrier is a load-bearing element of the rear disc brake, responsible for the proper guidance of the piston and brake pads. It is manufactured using technology specified by the vehicle manufacturer, which ensures appropriate rigidity, resistance to thermal loads, and repeatability of operating parameters. The design is prepared to work with factory mounts, lines, and brake hardware used in the BMW F-series.

By maintaining the original geometry, the housing allows for even pressure of the pads against the disc, which translates into predictable, linear braking and reduces the risk of uneven wear of friction elements. This is particularly important during intensive city driving and on long trips, where the braking system operates under varying load conditions.

Benefits of using an original brake housing carrier

Using a brake housing carrier dedicated to specific BMW models offers a number of practical benefits:

• preservation of factory fitment to the hub, carrier, and brake disc,
• consistency with the original hydraulic system and mounting hardware,
• stable guidance of brake pads throughout the entire operating range,
• reduction of the risk of vibrations and unwanted noise during braking.

The element from this group is particularly recommended for repairs where the priority is to maintain serial braking characteristics and compatibility with the vehicle's safety systems. Choosing an original brake housing carrier also facilitates easier diagnostics and future servicing.

Condition, origin, and service application

The brake housing carrier comes from the BMW range and is a used item, making it an attractive cost-effective solution while maintaining the proper standard of workmanship. This type of part works well both for typical replacement of a worn caliper and for more extensive service work, including the refurbishment of the rear axle braking system. Thanks to the original design, it is possible to use standard repair kits, seals, and guide pins intended for the given model.

Brake system service expansion and technical knowledge

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 brackets, check out the available parts in the BMW brake calipers and carriers category.

When selecting used brake system components, it is worth following proven procedures for verifying technical condition, compatibility, and installation methods. A detailed list of inspection steps and practical tips can be found in the article Second-hand braking system: how to safely choose discs, calipers, and ABS?, which helps to consciously plan purchases and service based on professional standards.