BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6764126

Description

BMW 3 E90 E81 E87 E88 Brake Booster Servo Pump is an original component of the braking system from the BMW group, designed for Series 1 and 3 models. This used part from the Brake Boosters and Proportioning Valves category allows for professional repair or replacement of the factory brake booster while maintaining the correct operating parameters of the braking system.

Specifications and technical data

• SKU: rhd-6764126
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6764126
• Substitutable numbers: 6764126, 34336779721, 6779721, 34336785665, 6785665, 34326764117, 6764117, 34316764132, 6764132, 34336779722, 6779722, 34336764130, 6764130
• Category: Brake Servos

Intended Use and Model Compatibility

The presented brake booster pump has been designed to work with the braking system of BMW 3 Series E90 and 1 Series E81, E87, E88. The OEM construction ensures proper fitment with the factory brake master cylinder, brake pedal, and vacuum lines, which facilitates installation in place of a worn component without the need for modifications.

Thanks to the use of an original BMW solution, the correct power assist characteristics are maintained, which translates to predictable braking performance, stable pedal feel, and consistency with the vehicle’s factory safety systems.

Technical Characteristics and Function in the Braking System

The brake booster pump is responsible for using vacuum to assist the force applied to the brake pedal. In practice, this means less effort for the driver when braking and a more linear system response. The original BMW design ensures:

• stable power assist across the full range of braking system loads,
• proper cooperation with the factory brake master cylinder,
• maintenance of the factory brake pedal operating characteristics.

The presence of dedicated interchangeable part numbers allows for precise part identification and selection of the correct variant for a specific vehicle configuration, which is particularly important for workshops and service centers specializing in the BMW brand.

Benefits of Using an Original BMW Brake Booster

Using a brake booster from the OEM BMW family instead of an aftermarket alternative allows for consistency throughout the entire braking system. Key benefits include:

• factory fitment to mounting points, geometry, and hardware in the engine bay,
• maintenance of parameters specified by the vehicle manufacturer,
• reduction of compatibility issues during subsequent repairs,
• easier diagnostics based on BMW service documentation.

For users and workshops, this means predictable installation, repeatable repair results, and the ability to maintain the vehicle in a configuration close to its original state.

Part Condition and Application in Service Practice

The offered brake booster pump is a used part, sourced from dismantling, which represents an attractive cost-effective solution while maintaining the original manufacturer’s specifications. This type of part is suitable for both professional workshops and discerning users who service their BMWs themselves.

To maximize the potential of used parts and ensure their longer service life, it is recommended to consult the guide: How to Extend the Lifespan of Used Car Parts from Dismantling. Additionally, when selecting parts by OEM and interchangeable part numbers, the purchasing guide will be helpful: Safe Online Purchase of Used Car Parts – A Practical Guide.

Summary

The BMW 3 E90 E81 E87 E88 Brake Booster Servo Pump is a functional solution for drivers and service centers who want to restore the proper operation of the braking system while maintaining manufacturer standards. The original design from the Brake Boosters and Proportioning Valves category ensures proper brake assist, and the use of a used part allows for optimizing repair costs without compromising compatibility with the factory BMW system.