Mercedes W202 Wheel Speed ABS Sensor Rear Axle Left Right N/O/S A2025400117

Mercedes W202 Wheel Speed ABS Sensor Rear Axle Left Right is a precision component of the ABS speed sensor system, responsible for accurately reading the rotational speed of the rear axle wheels. Mounted on either the left or right side at the rear, it supports the stable operation of the ABS system and traction control, which translates into safe and predictable vehicle behavior on the road. This solution is dedicated to users who expect a proven, factory-standard design tailored to the specifics of Mercedes W202 models.

Specifications and technical data

• SKU: A2025400117
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2025400117
• Substitutable numbers: A2025400117, A 202 540 01 17
• Location on the vehicle: Rear, Right, Left
• Category: ABS Speed Sensors

Function and role in the ABS system

The wheel speed sensor in the Mercedes W202 is responsible for generating a signal that the ABS controller uses to analyze the speed of individual wheels. A properly functioning component:

• enables precise modulation of braking force on the rear axle,
• supports vehicle stability during emergency braking,
• reduces the risk of wheel lock-up and loss of traction,
• ensures proper cooperation with other safety systems based on wheel speed readings.

Thanks to its dedicated placement on the rear axle, on either the left or right side, the sensor works with the pulse ring, generating a signal at the appropriate frequency, which allows the controller to react quickly and consistently in emergency situations.

Vehicle placement and fitment

The presented sensor is designed for installation on the rear axle, left or right side, which facilitates the selection of the correct component for ABS system repairs in the Mercedes W202. A single mounting reference for both rear sides:

• simplifies the part identification process,
• reduces the risk of ordering errors,
• allows for symmetrical replacement of both sensors on the axle if service requirements dictate.

Such a solution is particularly beneficial for comprehensive brake system maintenance when you want consistent performance from both sensors on the rear axle.

Product characteristics and application

The offered component belongs to the ABS speed sensor category, meaning it is an integral part of the electronic brake assist system. In practice, this translates into:

• stable ABS system operation under typical road conditions,
• proper functioning of safety features dependent on wheel speed signals,
• the ability to diagnose and clear errors related to incorrect rear axle speed readings.

The product is intended for Mercedes vehicles, ensuring a design consistent with the manufacturer's factory specifications and proper fitment to the brake system architecture in W202 models.

Condition and benefits of choosing a used sensor

The sensor is offered in used condition, which represents a reasonable compromise between repair costs and maintaining the vehicle's original specifications. Choosing this solution allows you to:

• lower service costs compared to new aftermarket replacements,
• maintain consistency with the factory ABS system design,
• preserve compatibility with the existing electrical installation and controller.

For many Mercedes owners, it is important that original components from disassembly often work better with the vehicle's electronics than random replacements with uncertain parameters.

Selection support and technical knowledge

When selecting a speed sensor for a specific version of the Mercedes W202, it is crucial to pay attention to the manufacturer's markings and compatibility with the ABS system used in the specific vehicle. Proper identification by OEM number and interchangeable part numbers minimizes the risk of purchasing an incompatible part and speeds up the repair process.

If you want to deepen your knowledge about making sensible choices regarding used electronic components, such as sensors or control modules, it is worth checking out the guide describing selection by VIN/OEM, hardware and software compatibility issues, and practical installation examples: Used automotive electronics – a guide to selecting ECU modules and sensors.

Related products and ABS system expansion

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

If you are considering a broader replacement of components in your car and want to better understand the advantages of original components from disassembly, the material describing the economic and technical aspects of such a solution will be helpful: used Mercedes parts from disassembly – a guide to original components.