BMW G11 G31 Rear Brake Caliper Unit Housing Carrier Left N/S 44/24 6870571

Visual condition of the part

The product shows signs of use visible in the photos.

BMW G11 G31 Rear Brake Caliper Unit Housing Carrier Left N/S 44/24 is an original BMW braking system component, designed for installation on the rear left axle of the vehicle. This used brake caliper from this series ensures factory mounting geometry, proper interaction with the brake disc and pads, and stable operating parameters during daily use. It is a solution for drivers who want to maintain the consistency of the braking system with factory specifications and avoid fitment issues.

Specifications and technical data

• SKU: 6870571
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6870571
• Substitutable numbers: 6870571, 34216870571, 34206891917, 6891917, 34206884629, 6884629
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper is a component from the Brake calipers and carriers group, responsible for generating the clamping force of the pads against the disc on the rear left side of the vehicle. The design of the caliper was developed by BMW to ensure stable distribution of braking forces, proper system operation in emergency mode, and compatibility with the factory braking equipment of the given model.

The placement on the vehicle in the rear axle zone on the left side helps maintain uniform braking characteristics between the right and left sides, which is important both for safety and for the correct operation of assistance systems, such as brake force distribution or traction control.

Original origin and reference numbers

The caliper comes from the BMW parts line and is marked with a factory OEM number, and also has interchangeable numbers assigned, which facilitates clear identification in the manufacturer's catalogs and professional parts selection systems. This allows for precise verification of compatibility with a specific engine and equipment version of the vehicle, minimizing the risk of installing an unsuitable component.

The presence of reference numbers also allows for easy comparison with the currently installed caliper in the car, which is particularly useful when replacing a single element in an already operational braking system.

Condition, installation, and technical aspects

The item is offered as a used BMW brake caliper, which means it comes from disassembly but retains its factory design and geometric parameters. This type of part is a good choice when you want to maintain the original braking characteristics without the need to use aftermarket replacements with uncertain specifications.

The placement on the vehicle defined as rear left facilitates the mechanic's work when planning the replacement – it allows for immediate selection of the appropriate set of pads and discs to work with this specific caliper. Installation takes place in the factory location, using standard mounting points, which reduces service time and eliminates the need for modifications.

Benefits of using an original BMW caliper

• Factory fitment – maintaining the original geometry of the BMW braking system without mounting compromises.
• Consistency with other system elements, such as discs and pads, which promotes even wear and predictable brake performance.
• Possibility of using existing service documentation and manufacturer procedures for diagnostics and maintenance.
• A reasonable compromise between cost and quality thanks to the use of a used OEM element instead of a new aftermarket replacement.

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, brackets, or guide carriers, check the available parts in the BMW Brake calipers and carriers category.

Safe selection of a used brake caliper

When choosing a used caliper, it is crucial to pay attention to compliance with the OEM number, placement on the vehicle, and the type of braking system used in the given model. It is also worth considering the service history of the car in which the element will be installed to select a component with the appropriate operating characteristics.

If you want to go through the process of verifying and selecting used braking system elements step by step, the following guide will be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?. Additionally, when making a decision between an original part and an aftermarket replacement, it is worth reading the material: 5 reasons why a used OEM part is a better choice than an aftermarket replacement, which practically discusses the advantages of using OEM components in BMW cars.