BMW F20 F21 F22 F30 F31 F32 M Sport Brake Servo Unit Master Cylinder 702619

BMW F20 F21 F22 F30 F31 F32 M Sport Brake Servo Unit Master Cylinder for the F20, F21, F22, F30, F31, and F32 series is an original braking system component, designed specifically for versions with sporty characteristics. Using a complete servo and master cylinder assembly allows you to maintain factory brake assistance parameters and consistency with other system components. This solution is intended for users who expect precise pedal response and stable brake performance in daily operation.

Specifications and technical data

• SKU: RHD-6851096-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6851096
• Substitutable numbers: 6851096, 34336851096, 702619, 16234B623
• Category: Master Cylinders

Purpose and compatibility with BMW F-series

The offered servo and master cylinder assembly is dedicated to BMW F-series models with the M Sport package, such as the F20 and F21 (compact), F22 (coupe), and F30, F31, and F32 (mid-size segment). The design is matched to the braking system characteristics of these generations, which helps maintain a consistent braking force balance between the front and rear axles and the appropriate pedal travel.

Choosing an original component from this group allows you to avoid problems with matching threads, connectors, and brake line connections, and also ensures proper cooperation with the factory electronics responsible for stability control and safety systems.

Technical characteristics of the servo + master cylinder assembly

The brake servo in this set is responsible for increasing the force applied to the pedal, providing the driver with clear yet predictable assistance. The integrated master cylinder, as an element from the Brake Master Cylinders category, distributes pressure to the brake circuits in a way adapted to the geometry and weight of BMW F-series vehicles.

Such a combination in a single assembly:

• facilitates installation and reduces the number of potential leaks,
• ensures stable operating pressure across the entire system range,
• promotes repeatable, predictable brake pedal response.

As a result, the system maintains proper braking force modulation, which is particularly important in M Sport versions, where a more direct pedal feel is expected.

Benefits of using an original BMW component

Using an original servo + master cylinder assembly in a BMW allows you to maintain the parameters intended by the vehicle manufacturer. This means:

• maintaining factory assistance characteristics and pedal travel,
• proper cooperation with ABS and traction control systems,
• appropriate fitment for brake line diameters and brake calipers.

For users who drive their cars intensively or enjoy dynamic driving, this directly translates into safety and brake performance repeatability. The original BMW design minimizes the risk of incorrect braking force distribution, which is crucial during sudden maneuvers and emergency braking.

Condition, origin, and practical application

The item comes from dismantling and is offered as a used original BMW part, which represents a reasonable compromise between cost and maintaining factory parameters. For many users, this is an effective way to restore full braking system efficiency after a servo or master cylinder failure, without the need to resort to cheaper replacements with uncertain characteristics.

In practice, such an assembly will work well both for standard replacement of a worn-out component and for post-collision repairs, when it is necessary to restore the original configuration of the braking system in a BMW F-series with the M Sport package.

Technical support and additional information

Before purchasing, it is worth comparing the part numbers with your vehicle's data and verifying the braking system configuration (e.g., caliper type and disc diameters) to ensure full compatibility. If in doubt, reading the vehicle's equipment data and consulting with a mechanic specializing in the BMW brand may be helpful.

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other components from the same group, such as master cylinders, servos, or assistance modules, check out the available parts in the BMW Brake Master Cylinders category.

To better plan your repair budget and consciously choose braking system components from dismantling, it is worth reading the guide on our blog: Brake calipers under the microscope – how to reduce repair costs by choosing proven recycled parts.

Additional tips on selecting used components, especially for older vehicle generations, are also provided in the article: how to deal with repairing older models using parts from dismantling, which helps assess the cost-effectiveness and safety of such solutions.