The coolant temperature indicator system in a vehicle consists of a warning light or temperature gauge on the dashboard and a coolant temperature-sending unit mounted on the engine. To replace the Engine Oil Temperature Sensor, the front of the vehicle should be raised and securely supported on jackstands. The electrical connector should be disconnected from the sensor, and then the sensor can be unscrewed from the adapter. During installation, it is important to use a new sealing washer and tighten the sensor to the specified torque.