Wheel Speed Sensor Mercedes W156 W176 Rear Left Right N/O/S ABS A2469057603

The Mercedes W207 Rear Wheel ABS Speed Sensor is a precise safety system component responsible for accurately reading the rotational speed of the rear axle wheels. This ABS speed sensor works with the anti-lock braking system, stability control, and driver assistance systems, ensuring the correct operation of the vehicle's electronics under various road conditions.

Specifications and technical data

• SKU: A2469057603
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2469057603
• Substitutable numbers: A2469057603, A 246 905 76 03
• Location on the vehicle: Rear, Right, Left
• Category: ABS Speed Sensors

Purpose and Function in the Vehicle

The presented component is a wheel speed sensor designed for installation on the rear axle, usable on either the right or left side. It generates a wheel rotational speed signal, which is then analyzed by the ABS system controller and related modules responsible for vehicle stability. A properly functioning sensor allows for:

• precise brake force distribution by the ABS system,
• cooperation with traction control and stability control systems,
• correct interpretation of wheel speeds on surfaces with varying grip.

Construction and Technical Characteristics

The rear wheel ABS speed sensor for the Mercedes W207 is an inductive/electronic component integrated with a signal cable, enabling direct connection to the vehicle's electrical harness. The cable and connector design is adapted to factory mounting points, facilitating installation and minimizing the risk of incorrect wiring routing.

The solution implemented by Mercedes ensures a stable signal across a wide speed range, as well as resistance to typical operational stresses such as vibrations, temperature changes, or contact with water and road debris.

Vehicle Placement and Installation

The sensor is designed for installation on the rear axle, usable on both the left and right sides. This solution simplifies part selection and allows for the use of one type of component on both sides of the vehicle. When replacing, it is recommended to:

• thoroughly clean the mounting socket in the steering knuckle or hub,
• check the condition of the pulse ring (if present in the specific design),
• inspect the electrical harness for chafing and contact corrosion.

Proper installation reduces the risk of ABS controller errors and ensures stable system operation in the long term.

Application in the Drivetrain and Diagnostics

Although the ABS speed sensor is primarily associated with the braking system, its signal is also utilized in a broader context of drivetrain operation and driver assistance systems. In many vehicle configurations, data from wheel sensors are used for:

• analyzing speed differences between wheels during traction control system operation,
• diagnosing potential issues within the differential or drive axle,
• cooperation with assistance systems that require accurate vehicle movement information.

If you have doubts about the condition of drivetrain components and related sensors, it is advisable to consult specialized materials. Practical tips for evaluating used components can be found in the article Used Differential – What You Should Know About Used Differentials, Sensors, and Drivetrain Systems, which helps in making informed decisions about diagnostics and part selection.

Benefits of Using an Original Mercedes Sensor

Using an ABS speed sensor specifically designed for the Mercedes W207 allows for maintaining consistency with the vehicle's factory specifications. The main advantages include:

• compatibility with the factory ABS controller and other safety systems,
• proper geometric fit to the steering knuckle and wheel hub,
• maintenance of signal parameters as specified by the manufacturer.

When replacing a single sensor, it is advisable to consider checking the other components on the same axle to avoid signal characteristic differences between the left and right sides.

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 sensors, signal cables, or components that work with the anti-lock system, check the available parts in the Mercedes ABS Speed Sensor category.