Audi A3 8Y Q3 F3 VW Golf Mk7 Wheel Speed ABS Sensor Rear Left N/S WHT003857C

Audi A3 8Y Q3 F3 VW Golf Mk7 Rear Left ABS Wheel Speed Sensor is an original component from the ABS Speed Sensor group, designed for precise monitoring of the rear left wheel's rotation. This used Volkswagen brand component ensures stable cooperation with the factory ABS system and traction control systems, supporting safe braking in daily use.

Specifications and technical data

• SKU: WHT003857C
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: WHT003857C
• Substitutable numbers: WHT003857C, WHT 003 857 C
• Location on the vehicle: Rear, Left
• Category: ABS Speed Sensors

Function and Application of the ABS Speed Sensor

The ABS wheel speed sensor mounted on the rear left axle is responsible for generating a signal about the wheel's rotational speed, which is then analyzed by the brake system controller. A properly functioning component allows the ABS system to limit wheel slip during braking, and also supports the operation of stability control and traction control systems.

Thanks to its dedicated placement on the vehicle, at the rear left side, the component is tailored to a specific mounting position, which facilitates servicing and minimizes the risk of errors during replacement. This solution is particularly beneficial for repairs of vehicles such as Audi A3, Audi Q3, or Volkswagen Golf, where compatibility with the factory brake system architecture is required.

Benefits of Using an Original Volkswagen Sensor

Choosing a used, original Volkswagen ABS wheel speed sensor is a sensible compromise between cost and quality. A component originating from the same component group as the factory equipment:

• supports correct cooperation with the existing electrical system and ABS controller,
• reduces the risk of diagnostic errors related to incompatible aftermarket parts,
• facilitates installation by maintaining factory geometry and mounting points.

For the user, this means more predictable vehicle behavior during braking and fewer potential service interventions after replacing the component. Consistency with the factory ABS system is particularly important in modern designs, where a single sensor interacts with multiple safety systems.

Selection and Installation on the Rear Left Axle

The sensor's placement on the rear left side of the vehicle requires attention to compatibility with the specific mounting position. When selecting, it is advisable to consider:

• its designation for the rear axle and the left side of the vehicle,
• its belonging to the Volkswagen group,
• compatibility with the ABS system used in the specific model.

During installation, it is important to maintain cleanliness of the socket and properly route the signal cable to avoid mechanical damage and reading interference. A used sensor, correctly installed, can effectively restore the proper operation of the ABS system after a failure of the previous component.

Brake System Safety and Diagnostics

A functional ABS wheel speed sensor has a direct impact on the operation of systems responsible for driving safety. In case of warning lights for ABS or ESP appearing, one of the first components to be diagnosed is the wheel sensor. Replacement with the correct component often allows for quick clearing of errors stored in the controller and restoration of full system functionality.

If you want to deepen your knowledge on making informed choices for brake system components from the aftermarket, it is worth reading the guide: Used Brake System: How to Safely Choose Discs, Calipers, and ABS?. This is a practical supplement to information when planning repairs or upgrades to your car's brake system.

Expanding Repairs within the ABS System

If you are planning a comprehensive repair or upgrade of the braking area in your Volkswagen and need other components from the same group, such as additional sensors for other wheels, signal cables, or components cooperating with the control module, check the available parts in the Volkswagen ABS Speed Sensor category.