BMW F30 F31 F32 Rear Brake Caliper Housing Carrier Left N/S 6850973

BMW F30 F31 F32 Rear Brake Caliper Housing Carrier Left N/S is an original braking system component designed for the rear left axle in BMW F-series models. The robust construction of the housing ensures stable guidance of the brake pad and disc, as well as the proper operation of the braking mechanism, which translates into safe and predictable braking in daily use. This used OEM component is a sensible choice for drivers who want to maintain factory system parameters at optimal service costs.

Specifications and technical data

• SKU: 6850973-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6850973
• Substitutable numbers: 34216850973, 6850973, 34216865641, 6865641, 34216850976, 6850976
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and fitment for BMW F-series

The presented caliper housing has been designed specifically for BMW F30, F31, and F32 platforms, intended for the rear left side of the vehicle. This ensures correct positioning relative to the hub, disc, and pads, as well as compatibility with suspension geometry and the factory brake line routing. As a result, installation is straightforward, without the need for modifications or adjustments.

As part of the Brake Calipers and Carriers group, the housing serves as the supporting base for the remaining working components of the caliper. Proper fitment for the specific BMW generation reduces the risk of uneven pad wear, improper piston retraction, or unwanted vibrations during braking.

Technical characteristics of the caliper housing

The caliper housing is responsible for maintaining a constant, axial position of the pads relative to the disc and for the stable guidance of the moving parts of the caliper. In practice, this means:

• precise guidance of the pads in the carrier,
• proper distribution of braking forces on the friction surface,
• maintaining the rigidity of the entire assembly during repeated heating and cooling cycles,
• correct positioning of mounting points relative to the steering knuckle and hub.

The original BMW design ensures compliance with factory dimensional tolerances, which is particularly important for the operation of assistance systems such as ABS or traction control. This used housing, sourced from dismantling, allows these parameters to be maintained without the need to resort to aftermarket replacements of uncertain specification.

Benefits of using an original caliper housing

Choosing an original caliper housing for a BMW F-series brings a number of practical advantages:

• Factory fitment – maintaining the original geometry of the braking system, with no risk of installation issues.
• Consistency with other system elements – compatibility with stock discs, pads, and brake lines.
• Stable long-term operation – construction designed for operation in high temperatures and variable road conditions.
• Economical repair – a used OEM element allows for reduced service costs while maintaining a high level of safety.

For workshops and private users, this means the ability to perform repairs in a technically correct manner, while maintaining the parameters specified by the vehicle manufacturer. The rear left brake caliper housing is a key element during any major intervention in the rear braking system, especially after mechanical damage or corrosion.

Safe selection of used braking system components

When choosing a used caliper housing, it is worth paying attention to compatibility with the part number, body generation, and vehicle placement. A detailed checklist for selecting brake components from the secondary market may be helpful – you can find it in the article Second-hand braking system: how to safely choose discs, calipers, and ABS?, which discusses step-by-step what to look for when purchasing calipers, discs, and control elements.

Expansion and modernization of the BMW braking system

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