大众朗逸EA211 1.4T节温器 04E121113B 精准控温 快速响应

When the engine coolant temperature cannot reach normal operating temperature for a long time, or the temperature gauge warning light frequently illuminates, while warm air is not hot and fuel consumption rises, this usually indicates the stock thermostat aging or failure. The thermostat regulates coolant flow according to temperature to keep the engine in the optimal temperature range, ensuring power output and fuel economy. OEM number 04E121113B; fits VW Lavida EA211 1.4T. Precise temperature control and quick response. Installation notes: must operate with cold engine; replace gasket and coolant simultaneously to avoid air pockets causing system failure.