Mercedes W163 ABS Wheel Speed Rotational Speed Sensor Rear Right O/S A1635422118

Mercedes W163 ABS Wheel Speed Rotational Speed Sensor Rear Right O/S is a precision safety system component responsible for the accurate reading of wheel rotational speed on the rear right axle of the vehicle. As part of the ABS speed sensor group, it works with the brake system control module, ensuring stable ABS operation and traction control. This used original Mercedes component allows for maintaining factory performance parameters without interfering with the vehicle's construction.

Specifications and technical data

• SKU: A1635422118
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1635422118
• Substitutable numbers: A1635422118, A 163 542 21 18
• Location on the vehicle: Rear, Right
• Category: ABS Speed Sensors

Function and application in the ABS system

The wheel speed sensor mounted on the rear right side of the axle is responsible for generating a signal proportional to the wheel's rotational speed. This information is continuously analyzed by the ABS control unit, which uses it to:

• detect the onset of wheel slip during braking,
• control pressure in the brake circuit of the specific wheel,
• support the operation of electronic stability control and traction control systems,
• enable even distribution of braking force between axles.

As a result, a properly functioning sensor on the rear right axle contributes to predictable vehicle behavior during braking, especially on surfaces with varying grip.

Benefits of using an original Mercedes sensor

Using an original sensor dedicated to the W163 series ensures compatibility with the factory brake system characteristics. This means:

• proper cooperation with the existing wiring harness and connectors,
• correct geometric fit to the rear right hub and steering knuckle,
• stable measurement signal with parameters specified by the manufacturer,
• reduced risk of errors in the ABS control unit and warning lights illuminating.

Choosing a used, original component is often a cost-effective solution for vehicles with higher mileage, where both proper system operation and rational maintenance costs are important.

Vehicle placement and installation aspects

The sensor is designed for installation on the rear right side of the vehicle, which is important both when selecting the part and during the installation itself. In practice, the installation involves:

• seating the sensor in the housing at the rear right wheel hub,
• routing the cable according to factory clips and guides,
• connecting to the appropriate ABS wiring harness in the rear of the body,
• verifying the wheel speed reading via diagnostics after installation.

Precise fitment to the specific installation location limits the risk of mechanical damage to the cable and signal interference, which is essential for long-term, stable system operation.

Product characteristics and practical application

As an element from the ABS speed sensor category, this component is intended for Mercedes W163 class vehicles, where the braking system relies on individual speed measurement for each wheel. Replacing the rear right sensor is recommended in situations where the following occur:

• ABS system errors related to the speed of a single wheel,
• uneven operation of the anti-lock braking system during braking,
• problems with traction control system operation when starting or accelerating,
• mechanical damage to the cable or sensor body in the rear right suspension area.

Selecting the correct sensor for the specific model and equipment version helps avoid electrical and mechanical compatibility issues and reduces diagnostic time after installation.

Used electronics and selection by part numbers

For components such as wheel speed sensors, correct identification using catalog numbers and manufacturer markings is crucial for compatibility with a specific vehicle. When selecting a used sensor, it is worth paying attention to compatibility with the body version, model year, and ABS system configuration.

To better understand the principles of safely choosing used modules and sensors, including selection by OEM numbers and hardware/software compatibility, it is worth reading the guide: Used automotive electronics – ECU modules and sensors from the secondary market in practice.

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 other wheels, speed measurement elements, or components working with the anti-lock system, check the available parts in the Mercedes ABS speed sensor category.