福克斯旧款长安马自达3节温器总成LF50-15 精准替换

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.