BMW 1 3 F20 F21 F30 F31 Front Right O/S Brake Caliper Housing Carrier 57/24

BMW 1 3 F20 F21 F30 F31 Front Right O/S Brake Caliper Housing Carrier is an original component from the Brake Calipers and Carriers group, designed for installation on the front right side of the braking system. The carrier provides a stable base for the caliper, ensuring proper brake pad guidance and even distribution of braking forces in BMW 1 and 3 Series models.

Specifications and technical data

• SKU: 6857688-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6857688
• Substitutable numbers: 34116857688, 6857688, 34116850971, 6850971, BG
• Location on the vehicle: Front, Right
• Category: Calipers & Brackets

Purpose and compatibility

The presented brake caliper carrier is designed specifically for the front axle on the right side in selected BMW 1 Series F20/F21 and 3 Series F30/F31 models. Its structural design is matched to the geometry of the steering knuckle and brake disc of these generations, allowing for precise caliper seating and the maintenance of factory braking system performance parameters.

By adhering to the manufacturer's original specifications, the component works with the brake discs and pads intended for these models without the need for modifying other sub-assemblies.

Construction and function of the caliper carrier

The caliper carrier is responsible for:

• stable mounting of the caliper to the steering knuckle on the front right side,
• guiding the brake pads relative to the disc,
• maintaining the correct operating position of the caliper throughout its entire range of motion,
• transferring braking loads to the vehicle's suspension.

A solid, one-piece construction ensures adequate rigidity, which limits deflection during heavy braking and helps maintain consistent, predictable system performance.

Benefits of using an original BMW carrier

Using an original caliper carrier in BMW 1 and 3 Series vehicles allows for the preservation of factory braking system performance. Key advantages include:

• secure fit to the steering knuckle and caliper – no issues with alignment or mounting clearances,
• maintaining the correct position of the pads relative to the disc, which promotes even wear of the friction material,
• compatibility with factory BMW solutions regarding suspension and brake geometry,
• suitability as a component for restoring proper system operation after a collision or intensive use.

This is a practical solution both for standard replacement of worn components and for repairs following mechanical damage in the area of the front right wheel.

Condition and service application

The offered BMW brake caliper carrier is a salvaged part intended for reinstallation in a vehicle after prior verification by a mechanic. It serves as a service component for:

• replacing a damaged or corroded carrier,
• restoring brake system geometry after suspension repairs,
• comprehensive front axle maintenance, including caliper refurbishment and pad replacement.

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

Safe selection of used brake components

When choosing a used caliper carrier, it is crucial to pay attention to the condition of the working surfaces, threads, and mounting points. It is also worth ensuring that the design matches the version of the braking system used in your specific BMW model to avoid issues with installation and caliper operation.

If you want to verify step-by-step what to look for when purchasing used brake system components, such as discs, calipers, or ABS parts, use the practical tips included in the article Second-hand brake system: how to safely select discs, calipers, and ABS?.