Mercedes C205 Rear Axle Right Left N/O/S Speed Sensor ABS Sensor A2059058503

Mercedes C205 Rear Axle Right Left N/O/S Speed Sensor ABS Sensor is a precision safety system component responsible for accurately reading the rotational speed of the rear axle wheels. A properly selected sensor ensures stable operation of the ABS system, traction control, and other driver assistance functions. Thanks to its factory-fit design for Mercedes models, installation is predictable, and integration with the vehicle's electronics is seamless.

Specifications and technical data

• SKU: A2059058503
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2059058503
• Substitutable numbers: A2059058503, A 205 905 85 03
• Location on the vehicle: Rear, Right, Left
• Category: ABS Speed Sensors

Purpose and vehicle placement

The presented sensor belongs to the ABS speed sensor category and is designed for installation on the vehicle's rear axle, with the flexibility to be used on either the left or right side. This solution facilitates part selection during brake system maintenance and allows for flexible use of the component depending on repair needs.

Placement on the rear axle is crucial for the proper functioning of electronic stability control, traction control, and the ABS itself, all of which require consistent and repeatable signals from each wheel. A properly functioning sensor minimizes the risk of controller errors and prevents warning messages from appearing on the instrument cluster.

Technical and functional characteristics

As a component dedicated to Mercedes vehicles, the sensor works with the vehicle's factory electronic system, transmitting the wheel rotational speed signal to the ABS control module. A stable input signal is the basis for:

• precise brake pressure modulation during emergency braking,
• proper operation of traction control and electronic stability systems,
• correct functioning of assistance features dependent on wheel rotational speed.

The sensor's geometry and mounting method are adapted to the hub and steering knuckle design of the C205 body style, which limits the risk of improper seating and ensures the correct working distance from the impulse ring.

Benefits of using an original sensor

Using a dedicated wheel speed sensor in the ABS system provides a range of practical maintenance and operational benefits:

• Compatibility with vehicle electronics – the sensor is designed for specific solutions used in Mercedes vehicles, which limits the risk of communication errors and diagnostic issues.
• Stable operating parameters – accurate wheel speed readings translate into predictable performance of active safety systems.
• Simplified diagnostics – in the case of future service inspections, the reading and interpretation of sensor data by a diagnostic tester are consistent with the manufacturer's specifications.

This component is particularly important when resolving issues such as an illuminated ABS warning light, ESP system errors, or improper traction control operation. Replacing it with the correct sensor allows for the restoration of full system functionality without the need to interfere with other components.

Product condition and practical service application

The offered sensor is an aftermarket component, which allows for cost-effective repairs while maintaining proper vehicle fitment. This type of solution is often chosen in professional workshops when the priority is combining correct operating parameters with reasonable brake system maintenance costs.

Before installation, standard service procedures are recommended: checking the socket, the wiring harness, and the condition of the impulse ring on the wheel. A correctly performed sensor replacement, combined with computer diagnostics, enables quick confirmation of the proper operation of the ABS system and related functions.

System expansion and electronics selection

When working with used electronic components in vehicles, including sensors, modules, and controllers, it is worth following proven selection and testing procedures. To better understand when choosing aftermarket electronics is justified and how to minimize risks during such repairs, read the article: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Related Mercedes ABS system components

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other items from the same group, such as additional sensors, signal cables, or mounting hardware, check out the available parts in the Mercedes ABS speed sensor category.