Mercedes X164 V251 Rear Wheel Brake Caliper Housing Bracket Left N/S A0044203983

Mercedes X164 V251 Rear Wheel Brake Caliper Housing Bracket Left N/S is an original brake system component designed for installation on the rear axle on the driver's side. Thanks to its factory-spec mounting geometry, it ensures precise caliper positioning relative to the brake disc, which translates into stable and consistent brake performance and safe vehicle handling.

Specifications and technical data

• SKU: A0044203983
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0044203983
• Substitutable numbers: A0044203983, A 004 420 39 83
• Location on the vehicle: Rear, Left
• Part type: Brake Caliper
• Category: Calipers & Brackets

Purpose and vehicle placement

The presented bracket belongs to the Brake Calipers and Brackets group and was designed specifically for installation on the rear axle on the left side in Mercedes X164 and V251 class vehicles. It is responsible for the rigid, axial guidance of the caliper relative to the disc, maintaining the correct operating clearance of the brake pads, and stable transfer of braking forces to the steering knuckle and suspension. The dedicated placement on the vehicle reduces the risk of incorrect installation, and the proper selection of the component for the specific side and axle of the vehicle facilitates the mechanic's work and minimizes vehicle downtime in the workshop.

Technical and functional characteristics

The bracket serves as a load-bearing base for the brake caliper, guide pins, and sliding elements. Its tasks include:

• maintaining a constant, repeatable position of the caliper relative to the brake disc,
• ensuring adequate system rigidity during intensive braking,
• stable mounting to the steering knuckle or control arm in accordance with the factory Mercedes design,
• compatibility with original guide pins, bolts, and rubber boots. Thanks to a design consistent with the vehicle manufacturer's specifications, the bracket maintains the correct geometry of the brake system, which promotes even pad wear and predictable operation of the ABS and ESP systems.

Original origin and condition

The component comes from the original Mercedes production line, which means full compliance with factory dimensional and material tolerances. As a used part, it retains its structural functionality, and its use is a reasonable alternative to new aftermarket replacements, especially in the case of maintenance repairs and service cost optimization. Choosing an original salvaged bracket allows you to maintain the consistency of the entire brake system with other OEM components, which is especially important in premium class vehicles where precision of operation and predictable vehicle behavior on the road are essential.

Benefits of using an original caliper bracket

Using this bracket in the brake system brings a number of practical benefits:

• Factory fit – no need for modifications, drilling, or adjustments; installation is compliant with Mercedes service documentation.
• Stable system operation – proper caliper alignment reduces the risk of uneven braking and unwanted vibrations.
• Cost optimization – a used OEM component allows for reduced expenses while maintaining high quality and compatibility.
• Support for long-term operation – a correctly selected bracket promotes even wear of pads and discs, which translates into predictable service intervals.

Brake system expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as calipers, yokes, or supports, check out the available parts in the Mercedes Brake Calipers and Brackets category. To better plan your service and consciously select salvaged components, it is worth using reliable technical materials. Practical tips regarding the selection, verification, and operation of used brake components can be found in the article Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing proven salvaged parts, which will help you assess the cost-effectiveness and safety of such solutions in your Mercedes.