Brake Servo Unit BMW F20 F21 F22 F30 F31 Master Cylinder 6798423

The BMW F20 F21 F30 F31 Brake Booster Servo is an original brake system component from the BMW group, designed for 1 and 3 Series models. This used part from the brake boosters and force regulators category allows for the restoration of proper brake assist function while maintaining factory performance characteristics.

Specifications and technical data

• SKU: 6798423
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6851099
• Substitutable numbers: 34336851099, 6851099, 34336851096, 6851096, 34337851569, 7851569, 34336796531, 6796531, 34337852160, 7852160, 6798423
• Category: Brake Servos

Application and Compatibility

The presented brake booster servo has been specifically designed for the BMW F20, F21, F30, and F31 platforms, ensuring a perfect fit with the factory mounting points and hydraulic system of these models. This allows the component to work seamlessly with the original brake pedal, lines, and master cylinder, ensuring consistency with other system components.

A correctly selected brake booster is crucial for maintaining proper assist force, stable pedal travel, and predictable vehicle response during braking. If you have any doubts about compatibility, it is advisable to compare part numbers or consult with a mechanic to select the correct variant for your specific engine and equipment version.

Technical Characteristics and Function in the Braking System

The brake booster servo utilizes vacuum pressure to amplify the force applied by the driver to the brake pedal. A properly functioning component contributes to:

• more stable and predictable pedal travel,
• reduced driver effort during intense braking,
• better vehicle control in emergency situations,
• maintenance of the BMW braking system's factory performance characteristics.

By using an original part from the BMW group, compatibility with the vehicle's factory parameters is ensured, which is important for both safety and proper integration with electronic systems such as ABS and stability control.

Condition, Origin, and Benefits of Choosing a Used Part

The offered brake booster is a salvaged part and is classified as used, representing a sensible compromise between cost and quality. By choosing an original second-hand component, you gain:

• access to a component with factory specifications,
• better fitment compared to many aftermarket alternatives,
• the possibility of an economical brake system repair,
• reduced waste through the reuse of functional parts.

To maximize the potential of salvaged parts, it is important to ensure proper installation and regular inspection of the braking system. Practical tips for operation can be found in the article How to Extend the Lifespan of Used Car Parts, which describes proven maintenance methods for aftermarket components.

Service Aspect and Installation

The brake booster servo should be installed according to BMW service procedures, maintaining cleanliness at all hydraulic and vacuum connections. It is recommended that installation be performed by an experienced workshop that will:

• check the vacuum system for leaks,
• verify the correct operation of the brake pedal after installation,
• perform any necessary brake system bleeding,
• assess the interaction of the brake booster with the existing master cylinder.

Properly executed installation restores the full functionality of the braking system and ensures safe vehicle operation in everyday conditions.

Why Choose This Component for BMW F20/F21/F30/F31

Choosing a brake booster from the Brake Boosters and Force Regulators category specifically designed for particular BMW models is a way to maintain the vehicle's structural integrity. You receive a component engineered for the specific platform, which translates to:

• factory fitment to the body and braking system,
• predictable vehicle behavior during braking,
• preservation of the characteristic BMW pedal feel,
• the possibility of economical servicing without compromising original solutions.

If you plan on keeping your BMW from the F20–F31 platform years for the long term, consider a broader modernization using salvaged parts – inspiration and practical examples can be found in the guide Second Life for Youngtimers – How Used Car Parts Revitalize Cars from 1998–2012.