Mercedes R231 Wheel ABS Speed Sensor Rear Left Right N/O/S Cable A2315400317

Mercedes R231 Wheel ABS Speed Sensor Rear Left Right N/O/S Cable is a precision safety system component responsible for accurately reading the rotational speed of the rear axle wheels. By utilizing an original Mercedes solution, the sensor works in tandem with the ABS system, stabilizing brake system performance and supporting the operation of advanced traction control systems. It is a practical choice for users who expect reliable chassis electronics performance.

Specifications and technical data

• SKU: A2315400317
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2315400317
• Substitutable numbers: A2315400317, A 231 540 03 17
• Location on the vehicle: Rear, Right, Left
• Category: ABS Speed Sensors

Function and role of the ABS speed sensor

The wheel speed sensor in the ABS speed sensor category is responsible for generating a signal that the brake controller uses to regulate pressure in the brake circuits. A properly functioning component allows for:

• stable ABS system operation during emergency braking,
• efficient performance of traction control and electronic stability control systems,
• reduced risk of wheel lock-up on slippery surfaces,
• maintaining proper communication between the wheel and the vehicle's electronics.

Its placement on the rear axle, with the ability to be mounted on either the left or right side, ensures service flexibility and facilitates adaptation to specific suspension configurations.

Purpose and installation in Mercedes vehicles

The presented sensor has been designed for Mercedes vehicles, which translates into precise geometric fitment and electrical compatibility with the factory wiring. The integrated cable facilitates routing the harness along the control arm or rear beam, reducing the number of connections and potential points of failure.

The placement defined as rear, right, left (marked in the data as placement on vehicle) allows the service technician to clearly identify the mounting position. As a result, the replacement is predictable, and vehicle downtime can be kept to a minimum.

Performance characteristics and benefits of use

Using an original wheel speed sensor in the ABS system translates into consistent operation of the entire braking system. This component:

• supports even distribution of braking force to the rear wheels,
• provides a repeatable input signal for the ABS controller,
• reduces the risk of errors related to incorrect speed readings,
• helps maintain vehicle stability during cornering braking.

By maintaining the factory design concept, the sensor works with existing system components without the need for installation modifications. This solution is particularly beneficial for workshops that want to maintain predictable installation times and operational certainty after repair.

Condition, verification, and selection by numbers

The offered item is marked as used, which in practice means it has been removed from a vehicle and verified for further serviceability. Such components allow for optimizing repair costs while maintaining the manufacturer's original specifications.

Selecting the sensor for a specific vehicle should be based on OEM part numbers and interchangeable numbers (this information can be found in the specification section, e.g., as OEM part number and interchangeable numbers). Additionally, using the SKU number, which uniquely identifies the product in the store's offer, can be helpful.

If you want to better understand how to safely use used electronics and sensors in a car, it is worth reading the guide: used automotive electronics – ECU modules and second-hand sensors.

System expansion and additional materials

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 additional sensors, signal cables, or wiring harnesses, check the available parts in the Mercedes ABS speed sensor category.

For drivers interested in broader use of used components in modernization and tuning projects, the following blog material discussing the selection of such elements may also be helpful: the best used parts for tuning your car.

Summary

Mercedes R231 Wheel ABS Speed Sensor Rear Left Right N/O/S Cable is a practical solution for users and workshops that want to restore full functionality of the ABS system in Mercedes cars. Proper placement on the rear axle, compliance with the factory installation, and the ability to select by technical numbers make it a reasonable choice for brake system and stability control system repairs.