The Hella ABS Wheel Speed Sensor - 012679531 is a sensor used in vehicles to measure the rotational speed of the wheels. It is a crucial component of the anti-lock braking system (ABS) as it provides important data to the vehicle's computer to help prevent wheel lock-up during braking. This sensor is designed to accurately detect the speed of each wheel and send this information to the ABS control module. It is made by Hella, a reputable automotive parts manufacturer, and is designed to meet or exceed OEM specifications for performance and durability. This ABS wheel speed sensor is compatible with various vehicle makes and models and is an essential part of the braking system to ensure safe and efficient operation of the vehicle.