Mercedes W177 Speed Sensor Axle ABS Sensor Rear Left Right N/O/S A2479050100

Mercedes W177 Speed Sensor Axle ABS Sensor Rear Left Right is an original component from the ABS speed sensor group, designed for operation on the vehicle's rear axle. It ensures precise wheel speed readings, which translates into stable operation of the anti-lock braking system and safety-assist systems in your Mercedes.

Specifications and technical data

• SKU: A2479050100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2479050100
• Substitutable numbers: A2479050100, A 247 905 01 00
• Location on the vehicle: Rear, Right, Left
• Category: ABS Speed Sensors

Purpose and function of the sensor

The presented sensor is dedicated for installation on the rear axle, on either the left or right side, which facilitates brake system maintenance in W177 series models. As a component responsible for measuring wheel rotational speed, it works in conjunction with the ABS control module, traction control, and other vehicle stability systems, enabling their correct response in emergency situations.

Thanks to its carefully selected operating characteristics, the sensor allows for stable braking force distribution, reduction of wheel slip, and improved vehicle control on wet, slippery, or uneven surfaces. This is particularly important in modern Mercedes vehicles, where electronic systems intensively utilize signals from speed sensors.

Construction and fitment for Mercedes

The sensor has been designed with the specific requirements of the W177 platform in mind, which means proper geometric fitment to the hub and steering knuckle, as well as compatibility with the factory wiring harness. The appropriate cable length and correct connector type allow for installation without any modifications to the wiring, which is beneficial for both professional workshops and DIY enthusiasts.

As an original Mercedes component, the sensor maintains operating parameters consistent with the vehicle manufacturer's specifications. This results in proper cooperation with the factory ABS controller and minimizes the risk of diagnostic errors that often appear when using random aftermarket replacements with incorrect characteristics.

Vehicle placement and installation aspects

The component is designed for installation on the rear axle, with the possibility of use on either the right or left side. This solution simplifies part selection during service – one type of sensor can handle both sides, which reduces the number of variants needed in workshop inventory.

When replacing, it is recommended to:

• thoroughly clean the mounting socket in the steering knuckle or hub,
• check the condition of the impulse ring (if it is a separate component),
• verify cable routing to avoid chafing and tension,
• ensure there is no corrosion or contamination in the area of the electrical connector.

This approach allows you to fully utilize the sensor's capabilities and reduce the risk of needing to disassemble it again in the near future.

Characteristics of the used component

The offered sensor comes from the secondary market, which represents a reasonable compromise between repair costs and maintaining the manufacturer's original specifications. A used component of this class allows for an economical repair of the ABS system while maintaining proper fitment to the vehicle's electrical and mechanical systems.

Choosing an original, used speed sensor is particularly beneficial where compliance with factory parameters and minimizing the risk of communication issues within the vehicle network are important. This solution is often preferred by workshops specializing in the Mercedes brand that prioritize proven components.

Technical support and additional information

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 sensors, signal cables, or mounting elements, check out the available parts in the Mercedes ABS speed sensor category.

When selecting a used sensor and other drivetrain and control system components, it is worth paying attention to how they were used and typical signs of wear. Practical tips on assessing the condition of such components can be found in our guide: Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.

If you want to better plan your repair budget and make informed choices when selecting components from the secondary market, our guide to buying second-hand parts may also be helpful: Used parts – your guide to the best deals in an automotive store.