This FEBI BILSTEIN coolant temperature sensor, part number 188626, is designed to provide precise monitoring of your engine's operating temperature. Accurate temperature data is crucial for the engine control unit (ECU) to manage fuel injection, ignition timing, and cooling fan operation, thereby preventing overheating and ensuring efficient performance. Crafted with high-quality materials, this sensor is built for durability and reliable long-term operation. It meets or exceeds original equipment specifications, guaranteeing a perfect fit and function. Replacing a faulty coolant temperature sensor can resolve issues such as poor fuel economy, rough idling, and the illumination of the check engine light.