BMW 3 Series F30 LCI 330e Hybrid 3 Brake Servo Unit Master Cylinder 6855846

The BMW F30 LCI 330e Hybrid Brake Servo Booster is an original component of the braking system from the Brake Boosters and Proportioning Valves group, designed for facelifted hybrid BMW 3 Series models. It ensures stable, predictable brake assist, which is particularly important in hybrid vehicles where the braking system works in conjunction with the energy recuperation system.

Specifications and technical data

• SKU: 6855846
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6855846
• Substitutable numbers: 34336858064, 6858064, 34336851096, 6851096, 34337851569, 7851569, 34336796531, 6796531, 34337852160, 7852160, 6855846, KZ
• Category: Brake Servos

Application and Function in the BMW 330e Braking System

The presented brake servo booster is responsible for properly assisting the force applied to the brake pedal, ensuring the driver experiences a consistent and predictable vehicle response. In the hybrid BMW 330e, this component works with advanced control electronics, providing a smooth transition between hydraulic braking and energy recovery.

By using an original component from the BMW range, the factory pedal feel is maintained, contributing to driving comfort, vehicle stability, and seamless integration with other braking system components.

Benefits of Using an Original Servo in the BMW F30 LCI 330e

Choosing a brake servo booster from the same product line as the factory equipment allows for adherence to the manufacturer's specified parameters. This is especially crucial for hybrid vehicles where the braking system is tightly integrated with the energy management and electric drive systems.

• maintaining factory brake assist characteristics,
• consistent cooperation with the vehicle's control electronics,
• precise fit for the BMW F30 LCI 330e Hybrid construction,
• reducing the risk of system errors caused by incompatible aftermarket parts.

Original sourcing from BMW also facilitates easier diagnostics and servicing, as the servo's operating parameters are known and documented in the manufacturer's service manuals.

Condition, Fitment, and Installation Aspects

The component is offered as a used OEM part, meaning it comes from a dismantled vehicle and retains its original design intended for this generation of the BMW 3 Series. This type of part is particularly attractive to users seeking a factory solution at a more favorable price than a new component.

The brake servo booster is designed for installation in the BMW F30 LCI 330e Hybrid braking system, following standard service procedures. In practice, this means it can be used as a direct replacement for the factory-installed component, provided appropriate brake system bleeding and calibration procedures are followed.

Interchangeable Numbers and BMW Range Compatibility

The product has an assigned OEM part number and associated interchangeable numbers, which simplifies verifying compatibility with a specific vehicle configuration. This allows for precise selection of the servo for a given BMW 330e model, minimizing the risk of incorrect fitment.

Before purchasing, it is recommended to compare the part numbers with the vehicle's data and service documentation to confirm compatibility within the specific equipment version and model year.

Expanding BMW Braking System Service

If you are planning a comprehensive repair or upgrade of the braking area in your BMW and require other parts from the same group, such as brake master cylinders, brake proportioning valves, or additional assist components, check the available parts in the BMW Brake Boosters and Proportioning Valves category.

For users who are simultaneously servicing comfort systems in their vehicle – including air conditioning and heating – practical tips on selecting used OEM components and maintenance schedules may be useful. A detailed discussion of these topics can be found in the article Air Conditioning and Heating – Part Selection and Maintenance for Year-Round Comfort, which helps plan vehicle servicing in a way that is consistent with the operation of other key systems.

Summary

The BMW F30 LCI 330e Hybrid Brake Servo Booster is a functional, original component of the braking system, dedicated to the facelifted hybrid version of the BMW 3 Series. It provides proper brake assist, working in conjunction with the vehicle's advanced systems and allowing for the preservation of factory brake pedal feel. Choosing this component is a sensible solution for drivers who want to maintain the technical consistency of their car while optimizing service costs.