Ford Focus (Old Model) / Changan Mazda 3 Thermostat Assembly LF50-15 Exact Replacement

If your vehicle shows abnormal water temperature gauge fluctuations, slow heater warming, or engine check light on with coolant leaks, thermostat assembly aging or seal failure is likely. This part controls coolant flow to reach optimal operating temperature and maintain cooling. This replacement is precise; OEM LF50-15 (compatible with 37506A/ZB60A/LF50-15-170); fits Ford Focus old models and Chang’an Mazda 3 M3 models. Installation with engine cold; replace gaskets and coolant; bleed air and check for leaks.