The Napa TS4047 Coolant temp sensor is a temperature sensor designed for the engine compartment of vehicles. Manufactured by Napa, this sensor is a direct replacement for the original part with the number TS4047. It is a single sensor unit that accurately detects the temperature of the coolant to ensure optimal engine performance and prevent overheating. Easy to install and reliable in operation, this Napa coolant temperature sensor is a key component for maintaining the engine's cooling system.