New engine water temperature sensor switch for Datsun 280Z 1975 to 1978. This temperature sensor witht he two pin square connector is for fuel injection controls on 280Z and 280ZX. Includes sealing washer. This coolant sensor is on the drivers side with the smaller hex drive of the 2 temp switches. If you are needing the sensor for the temperature gauge, the coolant sensor with the single bullet style connector is for the temperature gauge.