Mercedes W204 W212 Rear Axle Left N/S Wheel Carrier ABS Sensor Wiring Holder

Mercedes W204 W212 Rear Axle Left N/S Wheel Carrier ABS Sensor Wiring Holder is an original body component designed for the rear left side of the vehicle, responsible for the stable mounting of the ABS system sensor. Precise mounting in this area is crucial for accurate wheel speed readings and the reliable operation of the anti-lock braking system. Thanks to its factory-spec geometry and fitment to the rear axle design, this component ensures the sensor maintains the correct position relative to the pulse ring, which translates into safe and predictable performance of the braking electronics.

Specifications and technical data

• SKU: A2045461143
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045461143
• Substitutable numbers: A2045461143, A 204 546 11 43, BG
• Location on the vehicle: Rear, Left
• Category: Other Transmission & Drivetrain

Purpose and function of the ABS sensor holder

The ABS sensor holder in Mercedes W204 and W212 models acts as a structural bracket that keeps the sensor at a constant, repeatable distance from the measuring element on the wheel. Its location on the rear left side of the vehicle means this component operates in demanding conditions – near the suspension, brakes, and wheel arch, where it is exposed to dirt and vibrations. A stable mount reduces the risk of sensor displacement, which helps avoid wheel speed reading errors and unwanted system warnings.

A properly selected mount is particularly important when diagnosing ABS issues, as it is necessary to ensure the correct position after replacing the sensor. Using a component that is structurally compliant with the factory design allows for maintaining the original operating characteristics of the braking system and stability control systems.

Compatibility with the Mercedes platform

The presented holder has been designed with the body and suspension architecture used in the W204 and W212 series in mind. This means it fits the shape of the wheel arch, mounting points, and sensor cable routing in the rear left part of the vehicle. As a result, the component integrates with the existing structure without the need for modifications, which facilitates installation and reduces the time required for service work.

For vehicles equipped with advanced safety systems, such as traction control or advanced stability control systems, the correct seating of the ABS sensor has a direct impact on their effectiveness. Using a mount consistent with the solutions applied by the vehicle manufacturer helps maintain the integrity of the entire measuring system on the rear axle.

Component characteristics and service application

The ABS sensor holder in this configuration is designed to work in an area exposed to variable mechanical loads and external factors. The bracket design ensures proper routing of the sensor and cable, minimizing the risk of chafing, looseness, or uncontrolled contact with moving suspension parts. This solution is particularly useful for:

• repairs following mechanical damage in the rear wheel arch area,
• replacing the ABS sensor when the existing mount is deformed or corroded,
• restoring the factory geometry of the measuring system after bodywork interventions.

The component from this group allows for organized routing of the sensor cable and its stable attachment, which promotes long-term, repeatable system operation. In the context of vehicle operation, this translates into more predictable performance of braking assistance and driving stability systems.

Condition and benefits of using a used part

The offered holder comes from a group of used parts, which in service practice often represents a reasonable compromise between repair costs and maintaining the original design. For body components and brackets, where geometry and compliance with the factory design are key, using a component from dismantling can be an effective solution, especially for repairs of vehicles used on a daily basis.

For workshops and individual users, this means the ability to restore the correct ABS sensor mounting without the need for replacements with uncertain geometry. Maintaining the correct position of the sensor relative to the rotating elements on the rear axle helps reduce the risk of repeated service interventions and additional diagnostics related to ABS system errors.

Expanding work within the Mercedes body area

If you are planning a comprehensive repair or modernization of the body area in your Mercedes and need other elements from the same group, such as linings, moldings, or decorative trims, check out the available parts in the Mercedes linings, decorative moldings and trims category.

For users interested in a broader context of using original and used parts in premium class vehicles, including the differences between standard and sports lines, an article describing the characteristics of components in the M Performance segment may be helpful – you can find it here: BMW M Performance: how do BMW M components differ from standard ones?.