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

The Brake Booster for BMW 1 / 3 Series E81 E87 E90 E91 E92 LCI is an original BMW braking system component, connecting the brake servo to the master brake cylinder. This component has been specifically designed for facelifted 1 and 3 Series E9x models, ensuring stable, predictable, and safe braking force application in everyday use.

Specifications and technical data

• SKU: rhd-6775932-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6775932
• Substitutable numbers: 34336785665, 6785665, 34336779722, 6779722, 34316764132, 6764132, 34326764117, 6764117, 34336779721, 6779721, 34336764130, 6764130, 6775932, KZ, 51477066576, 7066576
• Category: Brake Servos

Purpose and Function in the Braking System

The presented brake servo with master cylinder is responsible for amplifying the force applied to the brake pedal and precisely transmitting pressure to the brake circuits. Using a genuine BMW solution guarantees:

• correct brake pedal operating characteristics,
• compatibility with the factory ABS/ESP system,
• proper fitment with the engine bay geometry in E81, E87, E90, E91, and E92 LCI models.

This ensures the braking system retains parameters close to factory specifications, leading to predictable vehicle behavior in emergency situations.

Compatibility with BMW 1 and 3 Series Models

The component has been developed for the facelifted E8x/E9x platform, meaning its geometry, mounting points, and connection configurations are adapted to factory BMW solutions. In practice, this means:

• easier installation without the need for structural modifications,
• preservation of original brake line routing,
• compatibility with factory body brackets and mountings.

Selecting the correct brake servo with master cylinder is crucial for stable and repeatable braking force, especially in vehicles used dynamically or with higher mileage.

Characteristics of a Used Part

The offered component is a used part from disassembly, originating from an original BMW braking system. Such components are often chosen as an economical alternative to new OE parts, while maintaining a construction consistent with the manufacturer's original design. A used brake booster with master cylinder allows you to:

• reduce the cost of braking system repair,
• maintain the vehicle's original technical specifications,
• replace a worn or damaged component without altering the system's design.

To maximize the potential of parts from disassembly, it is advisable to follow appropriate installation procedures and regularly check the brake fluid level and system's tightness.

Professional Installation and Operation

Due to the importance of the braking system for safety, installation by an experienced service center is recommended. They will ensure:

• proper bleeding of the braking system,
• checking the tightness of connections and lines,
• verification of brake pedal operation after installation.

For users who want to consciously care for used market components, we have prepared a practical guide: proven ways to extend the lifespan of used car parts. You will find tips there on the proper operation and maintenance of disassembled components, including braking system parts.

Why Choose an Original BMW Brake Servo?

Choosing an original BMW solution for brake boosting primarily means:

• factory fitment for E8x/E9x LCI generation 1 and 3 Series models,
• maintaining the braking characteristics intended by the manufacturer,
• compatibility with other braking system components and electronic safety systems.

This solution is particularly recommended for owners who wish to maintain their car in a configuration close to factory original, while optimizing repair costs by using a used part with OEM construction.