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Every vehicle we drive needs to have some sort of way to determine the road speed as the vehicle is in motion.

A wheel speed sensor is used by the anti-lock brakes to determine if a wheel is moving at a different speed than the others in order to control the anti-lock brake or traction control functions.

The speed timing sensor, also known as a crankshaft position sensor, is one of many sensors your car’s computer relies on for input.

Most modern vehicles have anti-lock braking systems (ABS).

The transmission speed sensors are used to calculate the actual gear ratio of the transmission while in use.