This speed sensor monitors the rotational speed of a shaft or wheel in the tractor's drivetrain or transmission. It generates a pulsed electrical signal that the engine or transmission control unit uses to manage gear selection, PTO engagement, or ground speed functions. A failed sensor typically causes a loss of speed signal, which can trigger warning lights, limit transmission shifting, or disable speed-dependent functions. As an original-manufacturer component, it matches the electrical connector geometry and signal output characteristics of the factory-installed sensor, ensuring the control unit receives a correct waveform without signal conditioning modifications.