Mercedes R171 Master Cylinder Brake Booster Servo Reservoir Unit A0054306630

Mercedes R171 Master Cylinder Brake Booster Servo Reservoir Unit is a complete brake booster assembly designed for Mercedes vehicles. Using an original servo, master cylinder, and reservoir assembly allows you to maintain the factory characteristics of the braking system, ensuring predictable, stable, and safe operation during daily use.

Specifications and technical data

• SKU: A0054306630
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0054306630
• Substitutable numbers: A0054306630, A 005 430 66 30
• Part type: Brake Servo & Master Cylinder
• Category: Brake Servos

Technical specifications and function in the braking system

The described unit belongs to the Brake boosters and proportioning valves group, responsible for properly translating the pressure applied to the brake pedal into pressure within the hydraulic system. Integrating the servo, master cylinder, and fluid reservoir into a single assembly facilitates installation and reduces the risk of leaks at connection points. In practice, this means:

• stable braking force assistance under various vehicle load conditions,
• precise pressure dosing in the brake circuits,
• consistent operation with the vehicle's factory electronics and safety systems.

Compatibility and advantages of using an original assembly

The original brake booster assembly for Mercedes has been specifically designed for the geometry and parameters of the R171 model's braking system. As a result:

• the correct brake pedal travel characteristics are maintained,
• the system maintains factory operating pressures,
• the risk of issues with bleeding and integration with the existing installation is minimized. Choosing an original component from the Brake boosters and proportioning valves group is particularly important in vehicles equipped with advanced safety systems, where the operating parameters of the braking system are strictly linked to controller software.

Condition, origin, and practical application

The offered item is a used OEM component, which in practice means maintaining the factory design and fitment while offering a more attractive cost compared to a new part. This type of solution is often chosen for:

• post-accident brake system repairs,
• servo damage manifesting as a hard brake pedal or uneven booster operation,
• the need to replace the complete unit with the master cylinder and reservoir instead of refurbishing individual components. The factory design ensures proper placement of ports and mounting points, which facilitates installation in the engine bay without the need for installation modifications.

Operating a used brake booster

To maximize the potential of a used servo assembly, it is worth ensuring a proper installation procedure, replacing the brake fluid, and thoroughly bleeding the system. Practical tips on the operation and maintenance of dismantled components can be found in the article: How to extend the service life of used car parts?

Expansion and modernization of the Mercedes braking system

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other components from the same group, such as boosters, proportioning valves, or complete assistance assemblies, check the available parts in the Mercedes brake boosters and proportioning valves category.

Summary

Mercedes R171 Master Cylinder Brake Booster Servo Reservoir Unit is a technically matched, original assembly from the brake booster group. Using this solution allows you to restore the proper operation of the braking system, maintain factory operating parameters, and reduce the time required for the installation and configuration of the entire system.