Mercedes Vito W639 Brake Caliper Front Right O/S Bosch 300X28 A6394201183

The front right brake caliper for Mercedes Vito W639 Bosch 300x28 is an original part from the Brake Calipers and Brackets group, designed for the front axle on the passenger side. This solution is engineered for stable, predictable braking and proper cooperation with a disc of the appropriate diameter and thickness. Using a used OEM component allows you to maintain the original braking system characteristics without the need for aftermarket replacements with uncertain parameters.

Specifications and technical data

• SKU: A6394201183-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6394201183
• Substitutable numbers: A6394201183, A 639 420 11 83
• Location on the vehicle: Front, Right
• Part type: Brake Caliper
• Category: Calipers & Brackets

Purpose and Fitment

The presented caliper is specifically designed for the front right side of the Mercedes Vito W639 generation. The construction, prepared to work with a disc of a specific size of 300x28, ensures the correct contact surface between the pad and the disc, as well as even distribution of braking forces. This allows the system to maintain its original effectiveness, and the reaction to brake pedal application remains predictable and consistent with the manufacturer's specifications.

Construction and Technical Characteristics

The Bosch brake caliper used in the Mercedes Vito W639 features a proven hydraulic design adapted for intensive use in commercial vehicles. The appropriately selected piston diameter, caliper bracket geometry, and mounting point arrangement allow for stable pad guidance and even pressing against the disc. This configuration reduces the risk of uneven pad wear and minimizes braking vibrations.

The component is factory-prepared to operate under demanding thermal conditions typical for the front axle of a commercial vehicle. The robust caliper housing and optimized brake fluid flow channels contribute to maintaining adequate working pressure, which translates to stable braking force even during repeated, hard braking.

Benefits of Using an Original Caliper

Using an original brake caliper for the Mercedes Vito W639 offers a number of practical benefits:

• maintaining original braking characteristics and compatibility with other system components,
• proper fitment with the hub, disc, and brake lines,
• reducing the risk of installation problems due to dimensional compliance with the factory solution,
• seamless cooperation with vehicle safety systems such as ABS or ESP (assuming the entire system is functional).

For the user, this means more stable vehicle behavior during braking, predictable system response, and a lower risk of premature wear of discs and pads. For commercial vehicles, where loads and mileage are typically higher than in passenger cars, choosing an original caliper is particularly important for durability and safety.

Condition, Verification, and Service Application

The offered brake caliper is a used part, which in practice means the possibility of an economical brake system repair while retaining an OEM component. This type of part is ideal for both standard replacement of a worn caliper and for post-accident repairs where restoring the original geometry and braking characteristics is crucial. Before installation, the standard service procedure is recommended, including checking for leaks, the free movement of guides, and bleeding the entire system after installation.

To better prepare for selecting and installing used brake system components, it is worth consulting the practical tips contained in the article: Second-hand braking systems: how to safely choose discs, calipers, and ABS?. This is a helpful addition to your knowledge when planning repairs based on used parts.

Braking System Expansion and Modernization

Replacing the right front brake caliper is a good opportunity to comprehensively assess the condition of the entire front axle – discs, pads, flexible hoses, and other mountings. If you are planning a comprehensive repair or modernization of the braking zone in your Mercedes and need other parts from the same group, such as additional calipers, brackets, or mounting elements, check the available parts in the category Mercedes Brake Calipers and Brackets.