ABS Sensor Mercedes S124 W124 Front Right Speed Sensor A1245403217

ABS Sensor Mercedes S124 W124 Front Right Speed Sensor is a precision safety system component responsible for accurate wheel speed reading and the proper operation of the ABS system. Thanks to its factory-fit design for the front passenger side and the use of original Mercedes technology, this ABS speed sensor ensures stable communication with the vehicle's electronics and predictable vehicle behavior during braking. It is a practical service solution for owners of S124 and W124 series models who prefer a proven component over aftermarket replacements of unknown origin.

Specifications and technical data

• SKU: A1245403217
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1245403217
• Substitutable numbers: A1245403217, A 124 540 32 17, 0265006108, 0 265 006 108
• Location on the vehicle: Front, Right
• Category: ABS Speed Sensors

Purpose and function in the ABS system

The offered item belongs to the ABS speed sensor category and is designed for installation on the front right side of Mercedes S124/W124 series vehicles. Its task is to generate a wheel speed signal, which is then sent to the anti-lock braking system controller. A properly functioning sensor allows the controller to precisely regulate pressure in the brake circuits, reducing the risk of wheel lock-up and loss of traction during emergency braking.

The placement on the passenger side of the front axle is significant not only for installation but also for diagnostics – in the case of ABS errors concerning the front right wheel, replacing this specific component is one of the primary service steps. Using a dedicated sensor for this position minimizes the risk of mechanical and electrical compatibility issues.

Compatibility, identification, and selection by numbers

As a component intended for Mercedes vehicles, the sensor has been designed to work with the factory ABS controller and the original wiring harness. Identification is based on the OEM part number and associated interchangeable numbers, which facilitates the selection of the correct component for a specific body version and model year. This helps reduce the risk of purchasing an incompatible sensor that could cause system errors or incorrect wheel speed readings.

During the selection process, it is recommended to use manufacturer catalogs, reference numbers, and vehicle data (VIN) to confirm electrical and mechanical compliance. This approach is particularly important for electronics and components that interact with safety systems, where minor differences in specifications can affect the operation of the entire system.

Characteristics of the used sensor

The offered sensor is a used item, which in practice means it has been removed from a vehicle and was previously in operation. Such components are frequently chosen for servicing older Mercedes S124/W124 models because they allow for consistency with the original braking system design while reducing repair costs. In the case of ABS speed sensors, it is essential that the component maintains correct electrical parameters and shows no mechanical damage in the area of the measuring head and the connector.

Before installation, standard service procedures are recommended: cleaning the socket in the steering knuckle or hubs, checking the condition of the pulse ring, and inspecting the wiring harness leading to the ABS controller. A properly prepared installation site reduces the risk of signal interference and premature sensor wear, and also facilitates subsequent diagnostics of potential faults.

Benefits of using an original Mercedes sensor

Using a dedicated ABS speed sensor in a Mercedes S124/W124 offers several significant benefits:

• maintaining the factory performance characteristics of the ABS system and stable vehicle behavior during braking,
• secure fitment for the front right mounting position without the need for modifications,
• consistency with the original wiring harness and connector used by the manufacturer,
• the ability to effectively clear errors related to wheel speed readings on the passenger side.

For users who consciously choose used electronics and measuring components, such a sensor represents a reasonable compromise between repair costs and maintaining the proper functionality of the ABS system.

Technical support and additional ABS system components

If you are planning a comprehensive repair or upgrade of the braking system in your Mercedes and need other components from the same group, such as additional wheel sensors, signal cables, or parts interacting with the control module, check out the available parts in the Mercedes ABS Speed Sensor category.

When selecting a used ABS speed sensor and other electronic components, it is worth using practical tips on verifying numbers and compatibility. A detailed discussion of selection principles, the meaning of OEM numbers, and application examples can be found in the guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Additionally, to better protect yourself against mistakes when shopping online and to correctly interpret manufacturer markings, you can use the practical tips described in the article Risk-free online parts shopping – 5 proven ways to verify component compatibility using OEM numbers and paint codes, which discusses, among other things, the specifics of verifying components for Mercedes vehicles.