Brake Servo BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit 6778826

Brake Servo BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit is an original braking system component from the Brake Servos and Pressure Regulators group, designed for BMW 5 and 6 Series models of the E60, E61, E63, and E64 generations. This used OEM component ensures proper brake assistance, stable pedal operation, and the maintenance of factory braking force characteristics, which translates into predictable vehicle behavior on the road.

Specifications and technical data

• SKU: 6779742-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6779742
• Substitutable numbers: 34336779742, 6779742, 34336761086, 6761086, 34332282819, 2282819, 34336766595, 6766595, 6765937, 6778826, 34316761073, 6761073, 34336786586, 6786586, 34336781621, 6781621, 34316761079, 6761079, 6786556
• Category: Brake Servos

Purpose and function in the braking system

The brake servo in these BMW models is responsible for increasing the force applied by the driver to the brake pedal, utilizing vacuum from the engine or the vacuum system. This allows for powerful yet precisely modulated braking with relatively little pedal pressure. A properly selected servo is crucial for maintaining the factory balance between pedal comfort and braking efficiency.

This component works in conjunction with the master cylinder and other hydraulic braking system parts, ensuring stable operating pressure and repeatable system response under various operating conditions – from city driving to prolonged braking on the highway.

Benefits of using an original BMW servo

Using an original BMW brake servo instead of a worn or faulty unit allows you to maintain the parameters specified by the vehicle manufacturer. The most important advantages include:

• factory fitment for the braking system of specific BMW E60, E61, E63, and E64 versions,
• proper cooperation with the master cylinder and brake pressure regulators,
• appropriate assistance characteristics, ensuring predictable pedal feel,
• maintenance of vehicle safety and stability during intensive braking.

As a result, installing a used, original component is a cost-effective solution that also maintains the consistency of the entire braking system with the original design specifications.

Professional selection and installation

Before installing the brake servo in a BMW E60–E64 series, it is recommended to verify compatibility with the specific engine version and vehicle equipment based on the OEM part number and available interchangeable numbers. This helps avoid fitment issues and ensures proper operation with the existing master cylinder and vacuum system.

During replacement, it is worth paying attention to:

• the condition of vacuum hoses and connectors,
• the tightness of the vacuum system,
• proper adjustment of the pushrod between the servo and the master cylinder,
• proper bleeding of the brake system after work is completed.

This approach minimizes the risk of reduced braking efficiency and incorrect pedal "feel" after installation.

Used condition and operation

The offered component comes from disassembly and is classified as used, which means it may show signs of previous use, but it retains the functionality required for further operation. In the case of a brake servo, it is particularly important that there are no diaphragm leaks or issues with maintaining vacuum – these aspects are crucial for safety and driving comfort.

To extend the service life of the installed component, it is worth ensuring regular inspection of the braking system, periodic brake fluid replacement, and quick response to symptoms such as a hard pedal, hissing sounds when braking, or uneven brake performance. Practical tips on the operation and maintenance of used components can be found in the article How to extend the life of used car parts?.

OEM safety and compliance with standards

The brake servo in this offer is a BMW brand component, which means full compliance with the vehicle manufacturer's design specifications. Unlike replacements of unknown origin, the original component maintains the operating parameters intended for specific models, which has a direct impact on driving safety and vehicle stability during emergency braking. You can read more about the advantages of using original parts from disassembly in the material Quality assurance and OEM safety – why are used original car parts the best choice for your car?.

If you are planning a comprehensive repair or upgrade of the braking area in your BMW and need other components from the same group, such as servos, brake pressure regulators, or related assistance parts, check out the available parts in the BMW Brake Servos and Pressure Regulators category.