BMW E46 Z4 E85 Rear Wheel Brake Caliper Housing 40/10 Left N/S

BMW E46 Z4 E85 Rear Wheel Brake Caliper Housing 40/10 Left N/S is a component from the Brake calipers and brackets group, designed for operation in the rear left part of the braking system. It allows for the restoration of proper braking force and stable system operation in BMW vehicles, while maintaining factory performance characteristics.

Specifications and technical data

• SKU: 6758127-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6758127
• Substitutable numbers: 6758127, 34216758127, 1165031, 34211165031
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and vehicle placement

The presented caliper is designed for installation on the rear axle, on the left side. This placement is responsible for stable vehicle handling during braking, even distribution of braking forces, and correct interaction with other system components, such as brake discs, pads, and brake lines.

Thanks to its dedicated position in the system, the caliper contributes to a cohesive, predictable braking system, which is important both in daily use and in emergency situations.

Technical and functional characteristics

The model with the 40/10 designation has been constructed to maintain the appropriate clamping force of the pads against the disc, which translates into repeatable braking efficiency. The caliper design allows for precise guidance of the brake pad in the carrier, reducing the risk of uneven pad wear and vibrations during braking.

The element belongs to the Brake calipers and brackets group, which means it is compatible with the typical braking system architecture used in BMW E46 and Z4 E85 models. Properly selected mounting points facilitate installation and allow for the maintenance of the correct geometry of the entire system.

Benefits of using a used BMW caliper

Choosing an original, used brake caliper for a BMW allows you to maintain the factory operating parameters of the system while optimizing service costs. This type of component is particularly beneficial in the case of:

• post-accident repairs or spot repairs of the braking system,
• restoring the efficiency of a vehicle used on a daily basis,
• maintaining the structural consistency of the braking system with other OEM components.

A used caliper, selected according to the model designation and placement on the vehicle, allows for a technically correct replacement without the need for system modifications or interference with the suspension structure.

Selection, safety, and compatibility with the braking system

To ensure safe operation, it is crucial to match the caliper to the specific vehicle version and the side of installation. Proper component selection minimizes the risk of uneven braking, disc overheating, or excessive pad wear. It is worth paying attention to compatibility with the OEM part number and interchangeable numbers, which are detailed in the product's technical specification.

If you want to deepen your knowledge on the safe selection of brake components from the secondary market, check out the guide Second-hand braking system: how to safely select discs, calipers, and ABS?, where you will find a practical checklist for selecting used components.

Additionally, when making a decision between original parts, replacements, and used elements, the article Original, replacement, or used – which car parts are the most cost-effective?, which discusses cost and quality differences in the context of real-world operation, may be helpful.

BMW braking system expansion

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

Summary

BMW E46 Z4 E85 Rear Wheel Brake Caliper Housing 40/10 Left N/S is a technically matched rear braking system element, designed for installation on the left side. Its appropriate design and inclusion in the Brake calipers and brackets group allow for the maintenance of predictable braking characteristics and correct interaction with other system components in BMW vehicles.