BMW E81 E82 E87 E90 E91 E92 E93 Brake Master Cylinder Servo 6785663

BMW E81 E82 E87 E90 E91 E92 E93 Brake Master Cylinder with Servo is an original brake system component designed for BMW 1 and 3 Series models. As part of the Brake Master Cylinders category, it ensures proper pressure generation within the system and stable cooperation with the servo, which translates to predictable brake pedal performance and safe deceleration.

Specifications and technical data

• SKU: rhd-6785663
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6785663
• Substitutable numbers: 34336779719, 34336785663, 6785663, 6779719, 34316764124, 6764124
• Category: Master Cylinders

Intended Use and Compatibility

The presented brake master cylinder with servo has been specifically designed for BMW E81, E82, E87, E90, E91, E92, and E93 vehicles. This ensures a perfect fit with the factory engine bay geometry, correct port positioning, and proper connection to the brake pedal and vacuum system.

As an OEM-class component, the brake master cylinder maintains the original operating parameters set by the vehicle manufacturer. This allows the braking system to retain its factory braking force characteristics, and the pedal response remains consistent with BMW's design intentions.

Construction and Function in the Braking System

The brake master cylinder integrated with the servo is responsible for converting the driver's foot pressure into pressure within the brake lines. The servo assists this process by utilizing vacuum from the engine, enabling sufficient braking force with moderate pedal pressure.

In practice, this means:

• stable operating pressure in the braking system,
• consistent, predictable brake pedal operation,
• proper cooperation with other system components such as calipers, lines, and discs.

By retaining the factory design, the BMW brake master cylinder allows for uniform brake force distribution between the vehicle's axles, which is crucial for vehicle stability during hard braking.

Benefits of Using an Original BMW Brake Master Cylinder

Choosing an original brake master cylinder with servo for your BMW offers a range of practical advantages:

• Factory Fitment – no need for modifications to mounts, lines, or the brake pedal lever.
• Consistent Performance Characteristics – maintaining the familiar BMW pedal feel and linear brake force build-up.
• Compatibility with ABS/ESP Systems – the master cylinder works with the vehicle's factory electronics as intended by the manufacturer.
• Ability to Use Existing Installation – retaining original lines and connectors, simplifying installation.

A component from the Brake Master Cylinders category is critical for safety. Therefore, using an original BMW solution helps minimize the risk of bleeding issues, leaks, or improper pedal operation.

Condition, Verification, and Preparation for Installation

The offered brake master cylinder with servo is a used part, sourced from a dismantled vehicle. Such parts are routinely inspected for leaks, the condition of ports, threads, and the servo housing before being offered for sale. This allows for an assessment of their suitability for further use in a vehicle.

Before installation, it is recommended to:

• thoroughly bleed the braking system according to the BMW service procedure,
• inspect the condition of flexible and rigid brake lines,
• verify the level and quality of the brake fluid.

This approach allows for the full utilization of the offered master cylinder's potential and ensures stable, safe operation of the entire system.

Selecting Used Brake System Components – Knowledge at a Glance

When choosing used brake system components – such as master cylinders, calipers, or ABS modules – it is advisable to follow proven inspection procedures. A detailed list of steps to consider when purchasing can be found in the article: Used Brake System – How to Safely Choose Discs, Calipers, and ABS?. This provides practical knowledge to supplement your planning for comprehensive brake service on your BMW.

Other BMW Brake Master Cylinders

If you are looking for other BMW brake master cylinders compatible with different engine or body variants, check out our dedicated offer: BMW Brake Master Cylinders. This will allow you to easily compare available configurations and select the component that best suits your car's specific needs.