Mercedes W212 Hybrid ABS Wheel Speed Sensor Front Axle Right O/S A2125401917

Mercedes W205 Hybrid ABS Wheel Sensor Right Front Front is an original part from the ABS Speed Sensor group, designed for precise control of wheel rotational speed in Mercedes vehicles. It ensures stable cooperation with the braking system and safety systems, which translates into predictable ABS and traction control performance in everyday use.

Specifications and technical data

• SKU: A2125401917
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2125401917
• Substitutable numbers: A2125401917, A 212 540 19 17, A2129055805, A 212 905 58 05
• Location on the vehicle: Front, Right
• Category: ABS Speed Sensors

Sensor Purpose and Function

The presented sensor is dedicated for installation in the front suspension area on the right side, where it is responsible for reading the wheel's rotational speed and transmitting the signal to the brake system controller. A properly functioning element of this type supports vehicle stability during emergency braking, on surfaces with variable grip, and when activating driver assistance systems.

Thanks to its factory-matched design to the ABS architecture in Mercedes, the sensor integrates with the vehicle's existing electrical and electronic systems, reducing the risk of system errors and incorrect wheel speed readings.

Construction and Fit for Mercedes W205 Hybrid

The component has been specifically designed for the Mercedes W205 hybrid platform, taking into account the braking system's operating characteristics and the specific weight distribution of such a drivetrain. The sensor's construction is prepared for installation in factory mounting points, which facilitates servicing and reduces replacement time.

The appropriate shaping of the body and connector allows for a secure fit in the steering knuckle and safe routing of the cable, minimizing the risk of mechanical damage during suspension operation. This precise fit promotes the maintenance of stable measurement parameters over a longer period of use.

Benefits of Using an Original ABS Speed Sensor

Using an original sensor in the ABS system offers a range of practical benefits for the vehicle owner:

• signal consistency with the brake system controller's requirements,
• maintenance of correct ABS and traction control operation for the right front wheel,
• reduced risk of errors and warning messages on the dashboard,
• easier diagnostics for future brake system inspections.

For hybrid vehicles, where the braking system works in conjunction with the recuperation system, stable wheel speed reading is particularly important for smooth switching between mechanical braking and energy recovery.

Used Product Characteristics

The offered sensor is a used part, representing a reasonable compromise between repair cost and maintaining the original manufacturer's specifications. In practice, this means the possibility of restoring full ABS functionality while limiting expenses compared to purchasing a new part.

Choosing a used OEM component is particularly beneficial for precise electronic parts where structural compatibility and correct operating parameters are crucial, rather than visual appearance. This allows for effective restoration of the braking system's original properties without altering its design.

System Expansion – Other Mercedes ABS Speed Sensors

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 for other wheels, signal cables, or mountings, check the available parts in the Mercedes ABS Speed Sensor category.

Safe Selection of Used Brake System Components

When choosing a used ABS sensor, it is advisable to pay attention to compatibility with the specific body and drivetrain version, as well as its correct placement on the vehicle. It is also good practice to assess the condition of the wiring harness and connector to avoid communication problems with the control module.

If you want to streamline the process of selecting and installing used components in the brake system, a guide describing the key verification stages for such elements will be helpful. A detailed checklist can be found in the article “Second-hand braking system: how to safely choose discs, calipers, and ABS?”, which discusses the practical aspects of purchasing and installing used parts in such systems.