An ABS sensor is a crucial component of a vehicle’s anti-lock braking system. Its primary function is to monitor wheel speed and detect when a wheel is about to lock up during braking. By detecting impending lockup, the ABS sensor triggers the ABS module to reduce brake pressure to that wheel, allowing it to maintain traction and preventing skidding.
ABS sensors are typically mounted on the wheel hub or suspension components and use a magnetic or optical sensor to measure wheel speed. They are exposed to harsh environmental conditions, including dirt, moisture, and road salt, which can accumulate on the sensor and interfere with its operation.