BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder 6759450

Description

BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder from the E8x/E9x series is a brake system component responsible for effectively transferring force from the pedal to the hydraulic system. This BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder has been designed specifically for BMW 1 Series E81/E87/E88 and 3 Series E90/E91/E92 models, ensuring precise braking force modulation and stable operation in daily use.

Specifications and technical data

• SKU: rhd-6759450-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6759450
• Substitutable numbers: 34336779718, 6779718, 6759450, 34336785663, 6785663, 34326764117, 6764117, 34336764122, 6764122, 34336779719, 6779719, 34316764124, 6764124
• Category: Brake Servos

Purpose and function in the braking system

The presented BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder belongs to the Brake Servos and Boosters category, responsible for assisting the pressure force on the pedal and ensuring proper pressure distribution in the brake circuits. Using a dedicated BMW solution allows for maintaining factory pedal characteristics, predictable braking response, and consistency with other system components.

The original BMW design ensures:

• stable assistance across the full vehicle load range,
• repeatable pressure in the brake circuits with successive pedal presses,
• retention of the factory brake “feel,” which is essential for dynamic driving.

Compatibility with BMW 1 and 3 Series

The servo unit has been developed for the E8x and E9x platform, which means it is perfectly matched to the body architecture, mounting points, and brake system geometry of these generations. As a result, installation is straightforward, without the need for modifying mounts or interfering with the firewall structure.

In practice, this means:

• compliance with factory mounting points,
• correct positioning relative to the brake pedal and master cylinder,
• easier diagnostics and future service, in accordance with BMW procedures.

Performance characteristics and benefits of the OEM solution

The original BMW servo unit ensures consistency with the factory ABS/DSC system and other hydraulic brake components. Using a complete unit with the master cylinder reduces the risk of improper operation resulting from mixing components with different characteristics.

Key benefits include:

• factory fitment for the BMW braking system,
• retention of predictable vehicle response during emergency braking,
• consistency with the operating parameters of stability control systems.

The used condition means that the part comes from dismantling, which allows for an economical replacement while maintaining the manufacturer’s original specifications.

Professional selection and installation

To fully utilize the potential of this servo unit, installation in accordance with BMW service procedures is recommended, including proper bleeding of the brake system and leak testing. A correctly selected and installed component translates into stable braking parameters and comfortable pedal operation across the entire speed range.

If you want to better care for the durability of components from dismantling and optimize their operation, it is worth checking out the practical tips in the article How to extend the life of used car parts?, which describes, among other things, the principles of maintaining drivetrain and suspension components.

Expanding the BMW braking system

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 pumps, boosters, or additional assistance modules, check the available parts in the BMW Brake Servos and Boosters category.