BMW E46 Brake Servo Unit Master Cylinder 6750798 6785666 6753008

BMW 3 E46 Brake Booster – Servo with Brake Master Cylinder is an original BMW braking system component, designed for precise integration with the factory system in 3 Series E46 models. The use of a complete servo and master cylinder assembly ensures stable system pressure, predictable pedal response, and safe, repeatable braking in everyday use.

Specifications and technical data

• SKU: 6779682
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6779682
• Substitutable numbers: 34326750798, 6750798, 34336779682, 6779682, 34336756851, 6756851, 34336785666, 6785666, 34316763670, 6763670, 34316770917, 6770917, 34336779680, 6779680, 34316776002, 6776002, 34316752540, 6752540, 3321165524, 34321165529, 1165529, 6769850, 6753008, 34336753008, EM
• Part type: Brake Servo
• Category: Brake Servos

Technical Characteristics of the Servo + Brake Master Cylinder System

The presented servo and master cylinder assembly belongs to the Brake Boosters and Force Regulators group, responsible for assisting the force applied to the brake pedal and ensuring proper pressure distribution to the brake circuits. Integrating both elements into one set reduces the risk of component mismatch and simplifies installation at factory mounting points.

Original origin from the BMW brand means maintaining the correct operating characteristics, in line with the vehicle manufacturer's specifications – from pedal travel and braking force progression to compatibility with the vehicle's safety systems.

Intended Use and Compatibility

The servo with brake master cylinder has been specifically designed for the BMW 3 Series E46 platform, which translates to:

• appropriate fit for engine bay geometry and body mounting points,
• correct pushrod length and position relative to the brake pedal,
• compatibility with factory brake line routing.

An additional advantage is the presence of interchangeable part numbers, allowing the component to be used as a replacement for several factory references within the same generation of the BMW 3 E46 braking system. This simplifies part selection during vehicle upgrades or repairs.

Benefits of Using an Original BMW Brake Booster

Choosing a complete servo + master cylinder assembly instead of individual, randomly selected parts helps maintain consistent operating parameters for the entire system. In practice, this means:

• stable brake assistance across the full range of loads,
• consistent pedal engagement point, which improves brake feel,
• reduced risk of uneven pressure distribution between axles.

An original BMW component from the Brake Boosters and Force Regulators group is particularly recommended for repairs of vehicles used intensively – both in city traffic and on highways, where the braking system operates under varying thermal conditions.

Condition, Origin, and Installation Aspects

The component is a used part and is offered as a used OEM component, allowing for factory fit at an attractive price compared to new parts. Before installation, standard service procedures are recommended: leak testing, inspection of the connection ports, and proper bleeding of the entire braking system after installation.

Thanks to its original design, installation is a near plug-and-play process – without the need for modifications to mounting points or the vehicle body. This solution is particularly beneficial for vehicle repairs where maintaining the original driving characteristics is a priority.

How to Care for Used Brake System Components

To maximize the potential of a used brake booster and master cylinder, it is advisable to ensure regular brake fluid changes, inspection of flexible hoses, and periodic checks of system leaks. Practical tips for operating and maintaining used components can be found in the article How to Extend the Lifespan of Used Car Parts?, which discusses proven methods for keeping components such as engines, suspension, or electronics in good condition.

If you are planning a comprehensive repair or upgrade of the braking area in your BMW and need other parts from the same group, such as boosters, brake force regulators, or related assistance modules, check the available parts in the BMW Brake Boosters and Force Regulators category.