Mercedes W221 AMG OM642 Front Brake Caliper Right O/S Wheel Unit A0034205283

Mercedes W221 AMG OM642 front brake caliper right is an original brake system component designed for diesel-powered vehicles. Thanks to its factory design, it ensures stable pad guidance, even pressure on the disc, and predictable vehicle behavior during braking. A used OEM component is a sensible choice for drivers looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: A0034205283-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0034205283
• Substitutable numbers: A0034205283, A 003 420 52 83
• Location on the vehicle: Front, Right
• Fuel type: Diesel
• Category: Calipers & Brackets

Purpose and Technical Fitment

The presented caliper is designed as a brake system component for the front axle on the right side of the Mercedes S-Class W221 generation with the Diesel OM642 engine. Its precise placement on the vehicle facilitates the selection of the correct component for repairs or replacement of a unilaterally worn caliper.

The original caliper design ensures compliance with the vehicle's factory parameters, such as mounting geometry, piston working range, and compatibility with brake lines and pads intended for the AMG version. This maintains consistency with the stock braking characteristics without requiring modifications to other system components.

Braking System Operation Characteristics

The front right brake caliper in the AMG version is responsible for the efficient transfer of hydraulic force from the brake master cylinder to the pads, which translates into effective deceleration of the heavy S-Class limousine. The design adapted for diesel engines promotes stable operation under high thermal loads, typical for vehicles with high torque.

A properly selected caliper:

• maintains even pad pressure on the disc on the right side,
• reduces the risk of the vehicle pulling to one side during braking,
• supports correct interaction with safety systems such as ABS or ESP,
• allows for predictable brake pedal modulation.

Application in Diesel-Powered Vehicles

The OM642 diesel engine generates high torque, requiring a suitably matched braking system. The front right AMG brake caliper has been engineered to handle such loads, ensuring stable operation during frequent braking from higher speeds and when driving with a full load.

When combined with appropriately selected discs and pads, this component allows for the maintenance of the vehicle's factory safety and comfort levels, without compromising braking effectiveness.

Condition, Origin, and Benefits of Choosing Used OEM

The offered caliper comes from the Brake Calipers and Brackets group and is a used part, which significantly reduces repair costs while maintaining the original manufacturer's specifications. Choosing an OEM component from disassembly is particularly beneficial for owners of older W221 models, where a sensible balance between price and quality is a priority.

A used Mercedes brake caliper can be a good choice if you are looking for:

• maintaining factory braking characteristics,
• avoiding problems with aftermarket part fitment,
• reducing service costs while maintaining a high level of safety.

Braking System Expansion and Selection of Other Components

If you are planning a comprehensive repair or upgrade of the braking area 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 Mercedes Brake Calipers and Brackets category.

When selecting used brake system components, it is advisable to follow a proven verification procedure. A detailed list of steps on what to look for when purchasing discs, calipers, and ABS components can be found in the article Used Braking System: How to Safely Choose Discs, Calipers, and ABS?. Additional information on when it is worthwhile to opt for used parts versus new ones is provided in the entry Car Parts – New or Used? Comparing Costs, Quality, and Durability.