Mercedes Vito Viano W639 Brake Servo Booster Unit Master Cylinder A0014300108

The Mercedes Vito Viano W639 Brake Booster is an original brake system component from the Mercedes group, designed for use in Vito and Viano W639 series vehicles. A used brake booster is a sensible choice for drivers and workshops looking for a proven OEM part with stable operating parameters and predictable performance in daily use.

Specifications and technical data

• SKU: RHD-A0014300108
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0004312027
• Substitutable numbers: A0004312027, A 000 431 20 27, A0014300108, A 001 430 01 08, A0004317401, A 000 431 74 01, A6394300102, A 639 430 01 02
• Category: Brake Servos

Technical Characteristics of the Brake Booster

The presented brake booster belongs to the Brake Boosters and Regulators category, responsible for assisting the force applied to the brake pedal and proper pressure distribution within the system. Its vacuum-assisted design allows for significantly lighter pedal operation while maintaining adequate braking effectiveness across the full range of vehicle loads.

As an original component, the brake booster is designed for the specific parameters of the Vito and Viano W639 brake systems, ensuring proper assistance characteristics, compatibility with the factory brake master cylinder, and correct interaction with the vehicle's safety systems.

Intended Use and Compatibility

The brake booster is dedicated to Mercedes Vito and Mercedes Viano W639 generation commercial and passenger-commercial vehicles. By using an original solution from the manufacturer's range, factory mounting points, correct geometry, and proper positioning of vacuum connections and brake system connections are maintained.

The component has an assigned OEM part number and a set of interchangeable numbers, which facilitates selecting the correct version for a specific vehicle configuration. In practice, this means the possibility of directly replacing a worn booster with the presented model, without the need for installation modifications or bodywork alterations.

Condition, Origin, and Benefits of Choosing a Used Part

The offered brake booster is a used part obtained from dismantling and is sold as used. Such components from the aftermarket are an attractive alternative to new replacements, especially for vehicles used intensively or with higher mileage, where a reasonable cost-to-durability ratio is crucial.

By choosing an original brake booster from dismantling, you gain:

• preservation of the brake system's original operating characteristics,
• certainty of fit for a specific Vito/Viano W639 version,
• reduced risk of installation and system sealing issues,
• a more favorable repair cost compared to a new OEM part.

To maximize the potential of a second-hand part, it is advisable to ensure proper installation and regular inspection of the brake system's condition. Practical tips for operating dismantled components can be found in the article: How to Extend the Lifespan of Used Car Parts – A Global Parts Guide.

Application in the Brake System and Installation Aspects

The brake booster plays a crucial role in the vehicle's safety system, therefore its correct selection and installation directly impact braking comfort and effectiveness. For Mercedes Vito and Viano W639 models, using an original brake booster helps maintain:

• correct assistance force under various vehicle loads,
• stable brake pedal operation without excessive "sinking,"
• consistent interaction with ABS/ESP systems,
• factory mounting points and connection sealing.

Installation in a specialized workshop with appropriate experience in working with Mercedes brake systems is recommended. Such a workshop can verify vacuum seal integrity and the correct operation of the entire system after replacement.

Why Choose This Brake Booster for Mercedes Vito/Viano W639?

By opting for the Mercedes Vito Viano W639 Brake Booster from the used parts offering, you receive a component designed by the vehicle manufacturer, tailored to the specific platform, and verified for compatibility. This solution is particularly beneficial for users who expect predictable brake system performance while also seeking to optimize service costs.

If your vehicle exhibits symptoms such as a hard brake pedal, uneven booster operation, or a noticeable decrease in braking comfort, replacing the booster with a proven component from the same category can restore the system's proper operating parameters and improve driving safety.