Jinbei/Great Wall 4Y Thermostat B48GA-76-M100 Cooling System Upgrade Replacement

Jinbei Haisei, Great Wall Singer, and other older 4Y-series models: coolant temperature fluctuates high and low, radiator fan frequently starts, or warm air in winter is not hot; suggests replacing the thermostat. OEM number B48GA-76-M100 directly replaces B48GA-76 with a perfect fit and no modifications needed. This part controls coolant circulation to prevent engine overheating or overcooling, especially for long trips, stabilizing power and restoring original cooling performance.