Mercedes W204 Brake Caliper Rear Right O/S Wheel Brake Unit A2044230421

The Mercedes W204 Rear Right Brake Caliper is an original part from the Brake Calipers and Brackets group, designed for installation on the rear right axle of the vehicle. Its construction, compliant with the manufacturer's standards, ensures proper cooperation with the factory Mercedes braking system, stable pad guidance, and repeatable braking parameters. This is a solution for users who expect predictable system operation and the preservation of the vehicle's factory characteristics.

Specifications and technical data

• SKU: A2044230421
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2044230421
• Substitutable numbers: A2044230421, A 204 423 04 21
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Intended Use and Vehicle Placement

The presented caliper is dedicated for installation on the rear right side of Mercedes W204 series vehicles. Correct placement on the vehicle guarantees proper piston operation geometry, even pad pressure against the disc, and appropriate transfer of braking forces to the suspension and body.

By maintaining its factory design, the caliper works with the standard brake master cylinder, lines, and pads intended for this axle, which simplifies servicing and reduces the risk of incorrect component selection.

Construction and Function in the Braking System

As a component of the Brake Calipers and Brackets category, this model is responsible for converting hydraulic pressure into clamping force of the pads against the disc. The stable caliper housing keeps the guides and piston aligned, contributing to even wear of the friction linings and repeatable braking effectiveness.

A correctly selected rear right axle caliper helps maintain:

• symmetrical brake operation between the left and right sides,
• vehicle stability during emergency braking,
• proper cooperation with assistance systems such as ABS or ESP (if present in the specific vehicle).

Benefits of Using an Original Mercedes Caliper

Using an original caliper in a Mercedes W204 allows for the preservation of the braking system's factory operating parameters without the need for installation modifications. This is particularly important in vehicles where predictable braking behavior and compliance with the manufacturer's service documentation are crucial.

Key advantages of this solution include:

• factory fitment for the hub and disc mounts on the rear right axle,
• consistency with the original rear axle braking force characteristics,
• easier diagnostics and servicing due to compliance with Mercedes documentation.

Selection and Safety When Purchasing a Used Caliper

When choosing a used brake caliper, it is crucial to ensure it matches the specific vehicle version and to verify its compatibility with the hydraulic and mechanical system of that model. It is advisable to inspect the condition of the working surfaces, guide pin seats, and the overall sealing of the component to maintain an adequate safety margin in daily operation.

If you want to analyze in detail what to look for when buying used braking system components such as discs, calipers, or ABS components, the following guide will be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?

Expanding the Braking System in a Mercedes

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, mounting brackets, or supports, check the available parts in the Mercedes Brake Calipers and Brackets category.