Mazda Zhisheng Thermostat L327-15-170A Engine Cooling System Precise Temperature Control

Mazda Atenza and some other models use thermostat L327-15-170A mounted at the engine coolant outlet to control cooling water circulation path, ensuring engine runs at optimal temperature. OEM L327-15; installation difficulty: medium; labor about 1.5 hours; replace gasket and drain coolant. If the engine heats slowly, temperature gauge fluctuates, heater not warm, or coolant is consistently low, thermostat may be stuck or failed.