1Applicable Model: The water temperature sensor is for 4239D 4239T Engines. Please confirm whether it is consistent with the product you want before buying to avoid unnecessary return. 2OE Number: The part number for reference is AZ35440. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 3Real Time Monitoring: The engine water temperature sensor can monitor the temperature change of the engine coolant in real time and provide accurate temperature data in order to judge and regulate the operating state of the engine in time. 4High Accuracy Measurement: The coolant temperature sensor adopts high accuracy components and measurement technology, which can provide accurate temperature measurement values with high reliability and meet the requirements of precise control of engine temperature. 5Safety Warning: The engine temperature sensor can monitor the abnormal temperature of the engine coolant, and when the temperature exceeds the normal range, it will start the warning system to remind the driver to take measures in time to avoid damage caused by overheating of the engine.