Brake Caliper BMW X3 G01 Rear Left N/S Housing Carrier 42/20/330 6870575

Visual condition of the part

The product shows signs of use visible in the photos.

Brake Caliper BMW X3 G01 Rear Left N/S Housing Carrier 42/20/330 is an original braking system component from the Brake calipers and carriers group, designed for installation on the rear left axle of the vehicle. This used brake caliper provides a functional service solution, allowing for the maintenance of factory braking characteristics and proper distribution of braking forces in the BMW X3 G01. It is a practical choice for repairs where structural compatibility with the factory system is essential.

Specifications and technical data

• SKU: 6870575
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6870575
• Substitutable numbers: 6870575, 34216870575
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper is dedicated to installation on the rear left side of the vehicle, which is crucial for the correct routing of brake lines, bleeders, and interaction with the brake disc and pads. This component is responsible for stably pressing the pads against the disc, ensuring repeatable, predictable braking and even wear of friction linings on both sides of the axle.

Thanks to a design consistent with BMW's factory specifications, the caliper works with the stock brake master cylinder, lines, and auxiliary systems (such as electronic stability control systems), which facilitates maintaining consistent performance across the entire system.

Benefits of using an original BMW caliper

Using an original caliper in the BMW X3 G01 allows for maintaining the performance parameters specified by the vehicle manufacturer. In practice, this means:

• proper fitment to the carrier and wheel hub,
• correct geometry for brake pad guidance,
• consistency with the factory rear axle brake force control system.

For the user, this translates into stable vehicle behavior during braking, predictable brake pedal response, and a reduction in the risk of uneven wear of friction components. Choosing such a component is particularly important in vehicles where maintaining original handling characteristics and safety is a priority.

Installation and service characteristics

The rear left brake caliper for the BMW X3 G01 is designed as a component intended for installation in place of the factory part, without the need for modifications to the suspension or hub structure. This simplifies service work and reduces replacement time, as the mechanic can utilize existing mounting points and standard system bleeding procedures.

During installation, it is recommended to simultaneously check the condition of the disc, pads, and brake line to ensure consistent operation of the entire system. Replacing a caliper on one side of the axle should always be combined with a thorough diagnosis of the other side, which helps avoid differences in braking force between the left and right sides.

Practical application and selection of a used caliper

A used brake caliper is a solution often chosen for post-accident repairs, brake system refurbishments, or replacing components after guide pin or piston seizure. In the case of the BMW X3 G01, it is essential that the selected component is compatible with the body version and brake system configuration, which ensures the proper operation of safety systems.

Before installation, it is worth paying attention to the condition of the working surfaces, guide pin bores, and brake line connection points. A properly selected and prepared caliper reduces the risk of pad sticking, disc overheating, and uneven braking, which has a direct impact on driving comfort and safety.

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 mounting hardware, check the available parts in the BMW Brake calipers and carriers category.

Safe selection of used braking system components

When selecting a used brake caliper, it is crucial to verify compatibility with the specific vehicle model, its placement on the vehicle, and the technical parameters defined by the manufacturer. It is also worth paying attention to the service history and storage method of the part to minimize the risk of internal corrosion or mechanical damage.

If you want to streamline the process of selecting and installing used brake components, a guide describing step-by-step what to look for when purchasing such parts will be helpful. Practical tips can be found in the article "Second-hand braking system: how to safely choose discs, calipers, and ABS?", which discusses the most important technical and operational aspects related to such parts.