Mazda MPV coolant loss and smoke when AC is activated despite new oil, battery, radiator, and thermostat on Mazda MPV

Some Mazda MPV owners report experiencing coolant loss and smoke when the AC is activated, even after replacing the oil, battery, radiator, and thermostat. These issues may arise from various factors, including leaks, overheating, or evaporative loss, often exacerbated by a malfunctioning radiator cap, faulty water pump, or thermostat failure. Additionally, smoke during AC operation can indicate problems within the AC system, such as insufficient oil or excessive refrigerant, potentially leading to compressor overheating. Some owners also find that smoke from the radiator suggests a coolant leak, which could result in engine overheating if not addressed promptly. Internal leakage from the head gasket and extreme outside heat may further contribute to coolant loss. To mitigate these issues, it is advised to regularly monitor coolant levels, inspect hoses and the radiator for damage, and consider a pressure test to identify leaks. Consulting a professional mechanic for a thorough inspection may be beneficial for effective diagnosis and resolution.