Great Wall Zhongxing JAC Ruiling Water Temperature Sensor 3749010-JA, precise temperature control to prevent engine overheating

If your vehicle’s temperature gauge needle jumps abnormally, cold-start is difficult, or the electric fan cycles or fails to start, the OEM water temperature sensor may be aging or failed, failing to accurately transmit coolant temperature signals. This sensor monitors radiator temperature in real time and feeds signals to the ECU to control fuel injection and ignition timing, preventing overheating or overcooling and ensuring stable power output. Compatible with Great Wall, Zhidong, JAC, and Ruijin series; OEM 3749010-JA. Installation requires a good seal between the sensor and the radiator, appropriate torque to avoid rupturing the housing, and thorough bleeding of the cooling system to check for leaks.