Mercedes W204 Brake Caliper Rear Left N/S Wheel Brake Unit A2044230321

The Mercedes W204 Rear Left Brake Caliper is an original part from the Brake Calipers and Brackets group, designed for the rear left axle of Mercedes vehicles. Thanks to its factory design, it ensures proper pad guidance, stable piston operation, and predictable braking system performance in everyday use.

Specifications and technical data

• SKU: A2044230321
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2044230321
• Substitutable numbers: A2044230321, A 204 423 03 21
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and Fitment

The presented caliper is designed for installation on the rear axle, left side, which guarantees compatibility with the braking system geometry in the W204 body. Proper placement on the vehicle minimizes the risk of incorrect installation, and a design compliant with Mercedes factory standards allows for the preservation of original braking force parameters and even pad wear.

Technical and Functional Characteristics

The caliper functions as a key component of the friction system, responsible for pressing the pads against the disc and maintaining stable braking force on the rear axle. The design provided by the manufacturer ensures:

• precise pad guidance within the bracket,
• adequate rigidity of the caliper body,
• correct interaction with the vehicle's hydraulic braking system.

Thanks to the use of an original solution, compatibility with factory brake lines, mountings, and other braking system components is maintained, which facilitates installation and subsequent servicing.

Benefits of Using an Original Caliper

Choosing an original caliper for the Mercedes W204 allows for maintaining the consistency of the entire braking system with the manufacturer's specifications. This solution is particularly beneficial when you prioritize:

• maintaining predictable braking characteristics,
• minimizing issues with mounting component fitment,
• easier diagnostics and future servicing.

A part from this group is suitable for both standard replacement of worn components and for post-accident repairs where restoring the original geometry and system operation is crucial.

Condition and Practical Application

The caliper comes from the used original parts segment, which in practice means a favorable combination of factory design with an attractive price compared to new components. This type of part is often chosen by workshops specializing in the Mercedes brand when maintaining the original specification while optimizing repair costs is a priority.

Braking System Expansion and Technical Knowledge

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 holders, check the available parts in the Mercedes Brake Calipers and Brackets category.

When selecting used braking system components, it is advisable to rely on a proven inspection procedure. Detailed guidelines for assessing the condition of calipers, discs, and ABS components can be found in the article Used Braking System: How to Safely Choose Discs, Calipers, and ABS?, which serves as a practical checklist for informed purchasing.