This brand-new water temperature sensor matches part numbers HM-A40040 and KZ0001044, suitable for E320D, E312D and E323D excavators. It precisely tracks real-time coolant temperature and transmits stable signals to ensure normal engine operation. Built with high-sensitivity sensing components and rugged outer shell, it performs steadily in harsh construction environments. It meets original factory standards and is an ideal replacement for old or faulty sensors.