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

BMW F20 F21 F22 F30 Brake Booster Pump 6798423 is an original component of the braking system from the BMW group, designed for F-series models. As a part from the Brake Boosters and Proportioning Valves category, it ensures stable brake assistance and predictable vehicle behavior during intense braking.

Specifications and technical data

• SKU: 6798423-1
• 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

Purpose and Function of the BMW Brake Booster

The brake booster pump in BMW F20, F21, F22, and F30 models is responsible for increasing the force applied to the braking system without requiring stronger pedal pressure. A correctly selected booster maintains the original braking effectiveness parameters, which is crucial for vehicle safety and stability in emergency situations.

The offered component is an OEM type part, meaning it is a perfect fit for the braking system construction in the mentioned generations of BMW 1, 2, and 3 Series. This allows for installation in place of the factory component, without the need for modifications to the installation or interference with the system's geometry.

Construction and Compatibility with the Braking System

The brake booster pump in this reference works with the factory brake master cylinder and original brake lines used on the F platform. The construction is optimized for:

• stable transfer of pedal pressure force to the braking system pressure,
• repeatable operation during multiple, dynamic braking events,
• maintaining the correct brake pedal travel.

By using an original part with preserved reference numbers, precise verification of compatibility with the specific engine and equipment version of the vehicle is possible. This reduces the risk of selecting the wrong booster and simplifies workshop tasks.

Condition, Origin, and Practical Application

The component comes from a dismantled BMW vehicle and is offered as a used part. Such components are often chosen by workshops specializing in BMW service because they allow for maintaining the original braking system specification at a reasonable repair cost. A properly selected brake booster:

• restores the correct brake pedal feel,
• eliminates excessively hard or "spongy" pedal travel,
• ensures predictable system response during emergency braking.

To maximize the potential of a dismantled part, it is worth consulting the guide on operating used car parts: How to Extend the Lifespan of Used Car Parts?. You will find practical tips on maintaining mechanical components, including braking system components.

Benefits of Using an Original BMW Booster

Using an original brake booster pump in BMW F20, F21, F22, and F30 offers a range of tangible benefits:

• Factory Fitment – maintaining the original brake pedal operating characteristics and compatibility with other system components.
• Consistency with Safety Systems – proper cooperation with ABS, DSC, and other stability control systems.
• Optimized Repair Costs – a used OEM part allows for reduced expenses while maintaining a high level of safety.

For vehicles used intensively, including fleets and company cars, choosing an original brake booster is particularly advantageous as it minimizes the risk of incorrect braking system operation due to the use of aftermarket parts with uncertain specifications.

Summary

BMW F20 F21 F22 F30 Brake Booster Pump 6798423 is a functional, original component of the braking system designed for F-series BMW models from the compact and mid-size segments. As a part from the Brake Boosters and Proportioning Valves category, it allows for restoring proper brake function, maintaining factory operating parameters and full cooperation with the vehicle's safety systems.