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This FAE 31370 coolant temperature sensor is designed to provide precise readings of your engine's coolant temperature. Accurate temperature data is crucial for the engine control unit (ECU) to manage fuel injection, ignition timing, and cooling fan operation. By ensuring the ECU receives correct information, this sensor helps maintain optimal engine operating temperature, preventing overheating and contributing to better fuel economy. It is built to meet or exceed original equipment specifications for reliable and long-lasting performance. Proper functioning of the coolant temperature sensor is vital for overall engine health and efficiency. A faulty sensor can lead to various issues, including poor starting, rough idling, increased fuel consumption, and potential engine damage if overheating occurs.