BMW E81 E87 E90 E91 E92 E93 Brake Servo Unit Master Cylinder 2454368

BMW E81 E87 E90 E91 E92 E93 Brake Servo Unit Master Cylinder is a brake booster component designed for BMW 1 and 3 Series models, providing stable transmission of pressure to the brake pedal. Thanks to its factory OEM design, the servo works with the vehicle's hydraulic system in a predictable and safe manner, which translates into reliable brake system response in daily operation. This is a practical solution for users looking for a compatible component from the Brake Servos and Proportioning Valves category for their BMW.

Specifications and technical data

• SKU: 2454368
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6788042
• Substitutable numbers: 34332454368, 2454368, 34336779718, 6779718, 34336764122, 6764122, 6788042
• Category: Brake Servos

Purpose and function in the brake system

The brake servo in a BMW is responsible for amplifying the force applied by the driver to the pedal, effectively engaging the calipers and ensuring proper vehicle deceleration. For E81, E87, E90, and E92 models, using the correct servo is crucial for maintaining factory braking characteristics, including pedal travel and braking force progression.

The offered item, as a part from the Brake Servos and Proportioning Valves group, is designed to work with original master cylinders and other system components, which helps maintain consistency in the operating parameters of the entire system.

Compatibility and fitment for BMW

The servo has been developed with the architecture of the BMW 1 and 3 Series E-generation brake system in mind, taking into account mounting geometry, rod length, and the connection method to the brake pedal. This allows for maintaining:

• the correct pedal position relative to the driver,
• consistent assistance characteristics across the entire pressure range,
• proper cooperation with the vehicle's ABS/ESP system.

Such fitment reduces the need for modifications during installation and allows for maintaining braking parameters in accordance with BMW manufacturer specifications.

Performance characteristics and benefits

Using a dedicated brake servo in the BMW E81, E87, E90, and E92 allows for a predictable, linear pedal response, which is essential both in city driving and during emergency braking. The user gains:

• more comfortable braking force modulation with less physical effort,
• stable system operation under typical operating conditions,
• preservation of the factory brake "feel" characteristic of BMW.

An element of this type, coming from the OEM line, is designed for long-term cooperation with the hydraulic system, which helps maintain consistent operating parameters over a long period of use.

Condition, origin, and installation aspects

The offered BMW brake servo comes from dismantling and is marked as a used original part. This type of part is a good choice for users who want to maintain compliance with factory specifications while optimizing repair costs. Before installation, it is recommended to perform a standard verification of the vacuum system's tightness and check the correct operation of the pedal after installation.

In practice, installing the servo in these BMW models requires access to the firewall and pedal assembly, which is why the work is best entrusted to a workshop with experience in the E platform. A correctly installed component allows for restoring the original brake assistance parameters without the need for additional modifications.

Brake system expansion and selection of other components

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other elements from the same group, such as master cylinders, proportioning valves, or additional assistance modules, check the available parts in the BMW Brake Servos and Proportioning Valves category.

During service work in the engine compartment, it is also worth taking care of the efficiency of systems affecting driving comfort. The proper selection of air conditioning and heating components, especially when using parts from dismantling, is described in detail in the article: Air conditioning and heating – part selection and maintenance for year-round comfort. This makes it easier to plan a more comprehensive range of vehicle maintenance during a single workshop visit.