Mercedes W177 Wheel ABS Speed Sensor Front Axle Left N/S A2475400500

Mercedes W177 Wheel ABS Speed Sensor Front Axle Left N/S is a precision braking system component responsible for accurate wheel speed readings and the proper operation of the ABS system. Thanks to its factory-fit design for Mercedes models in this series, the sensor ensures stable integration with the vehicle's electronics and predictable vehicle behavior during braking. This used OEM component is a sensible choice for professional repairs where compatibility and maintaining original system performance parameters are essential.

Specifications and technical data

• SKU: A2475400500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2475400500
• Substitutable numbers: A2475400500, A 247 540 05 00
• Location on the vehicle: Front, Left
• Category: ABS Speed Sensors

Function and role in the ABS system

The presented item from the ABS speed sensor category is responsible for the continuous measurement of the front left wheel's rotational speed and transmitting the signal to the anti-lock braking system controller. A properly functioning sensor enables:

• precise pressure modulation in the brake circuit,
• stable ABS system operation during emergency braking,
• correct interaction with driver assistance systems that rely on wheel speed data.

Its placement on the front left axle means this component has a direct impact on driving stability during emergency braking and the correct operation of safety systems integrated with the ABS.

Vehicle fitment and installation

The sensor is designed as a part dedicated to the Mercedes W177 construction, which translates into a proper fit with the wheel hub and the vehicle's wiring harness. The specific placement on the vehicle (front, left side) facilitates the identification of the correct component during diagnostics and replacement.

In workshop practice, this means:

• the ability to install it in place of the factory sensor without modifications,
• maintaining the original geometry of the position relative to the impulse ring,
• correct routing of the cable and connectors in existing brackets.

Benefits of using an original sensor

Choosing a used, original speed sensor for a Mercedes vehicle helps maintain the consistency of the entire braking system's performance. Compared to aftermarket replacements, an OEM component typically provides:

• a stable measurement signal matched to the characteristics of the ABS controller,
• appropriate resistance to electromagnetic interference,
• compliance with factory diagnostic procedures used in service centers.

For the user, this means a lower risk of ABS system errors, dashboard warning lights, and unwanted electronic intervention during braking.

Condition and service application

The item is offered as a used OEM component, which is a cost-effective solution for repairs where combining functionality with cost optimization is key. This type of part is suitable both for replacing a damaged sensor after a failure and for the staged restoration of the braking system after a collision.

Due to the importance of the wheel speed signal for many safety systems, replacing a faulty sensor with a verified component dedicated to a specific vehicle model is a crucial step in professional repair.

Expanding knowledge and selecting other components

If you are planning a comprehensive repair or upgrade of the drivetrain in your Mercedes and need other elements from the same group, such as speed sensors, ABS system components, or parts that work with the drivetrain, it is worth checking out our guide on selecting used components – detailed information can be found in the article Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.

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 sensors for the other wheels, signal cables, or supporting mounts, check out the available parts in the Mercedes ABS speed sensor category.