Posted on 9/10/2026
A wheel speed sensor does more than report whether one tire is turning faster or slower than the others. Modern vehicles use wheel speed information for anti-lock braking, traction control, stability control, transmission operation, hill-start assistance, electronic parking brakes, and several driver-assistance features. When one sensor fails or sends an inaccurate signal, the vehicle may turn off multiple systems at once. Drivers often see several dashboard warnings even though one sensor, damaged wire, corroded connector, or worn wheel bearing is responsible for the original fault. How Wheel Speed Sensors Work Each wheel speed sensor measures the rotation of a wheel or axle. Depending on the vehicle, the sensor reads a toothed reluctor ring, a magnetic encoder built into the wheel bearing, or another rotating target. The sensor sends a changing electrical signal to the ABS control module as the wheel turns. The control module compares all four wheel speeds. Durin ... read more