BMW 1 3 SERIES E81 E87 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6775932

The Brake Booster with Brake Master Cylinder for BMW 1 and 3 Series E81 E87 E90 E91 E92 LCI is an original brake system component designed for facelifted models. This OEM solution ensures consistency with the vehicle's factory construction while enabling efficient, professional repair of your BMW's braking system.

Specifications and technical data

• SKU: rhd-6775932
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6779718
• Substitutable numbers: 6775932, 34336779722, 6779722, 34336785665, 6785665, 34316764132, 6764132, 34326764117, 6764117, 34336779721, 6779721, 34336764130, 6764130
• Category: Brake Servos

Purpose and Function in the Braking System

The presented brake booster with master cylinder is a component within the brake boosters and force regulators category, responsible for assisting the force applied to the brake pedal and properly dosing pressure in the brake circuits. The use of a complete booster + master cylinder assembly allows for the preservation of factory braking characteristics, in line with BMW manufacturer's specifications.

This component works in conjunction with the vehicle's ABS/ESP system, ensuring stable operating pressure and predictable braking system response under typical road conditions. This provides the driver with clear pedal feel and consistent braking effectiveness.

Advantages of Using an Original BMW Booster

Using an original brake booster–master cylinder assembly in the BMW 1 and 3 Series E8x/E9x generation offers a range of technical benefits:

• Factory Fitment – an OEM part is designed precisely for a specific platform, ensuring correct positioning of connections, mounting points, and pedal linkage.
• Consistent Assist Characteristics – maintaining the original brake force ratio and pedal travel, without undesirable changes in system feel.
• Compatibility with Factory Electronics – correct integration with the vehicle's safety systems, without the need for installation modifications.
• Reduced Risk of Leaks – using a complete assembly minimizes the number of connections that could be potential leak sources.

Product Characteristics and Condition

The offered component comes from the original BMW parts line, meaning it adheres to the vehicle manufacturer's quality standards in terms of materials, construction, and manufacturing tolerances. The product is used, which in practice means it has been in service in a vehicle but is still suitable for further use after proper installation and verification by a mechanic.

For workshops and individual users, this means the possibility of an economical brake system repair while maintaining the original part specification. For installation, the standard brake system bleeding procedure and leak check of all connections are recommended.

Professional Installation and Parts Selection

To fully utilize the potential of this booster–master cylinder assembly, it is advisable to entrust the installation to a specialized service center that will ensure:

• correct adjustment and setting of the brake pedal,
• inspection of brake lines and connectors,
• brake system bleeding according to the manufacturer's procedure,
• verification of ABS/ESP system operation after installation.

If you wish to broaden your understanding of component selection for your car, including elements that affect driving comfort, it is worth consulting the guide on the selection and maintenance of air conditioning and heating components for year-round comfort, which complements knowledge on a comprehensive approach to vehicle servicing.

Why Choose This Booster–Master Cylinder Assembly?

By choosing the brake booster with brake master cylinder for BMW 1 and 3 Series E81–E92 LCI, you opt for a solution consistent with the factory brake system concept. This is a beneficial option for those who want to restore proper brake function without experimenting with aftermarket parts of uncertain specifications. The original design, tailored to a specific BMW generation, and the ability to integrate with the existing system make this product a solid foundation for professional repair and continued safe vehicle operation.