Hyundai Kia 25600-2G545 Thermostat Housing Assembly

The 25600-2G545 is a genuine OEM coolant thermostat housing assembly designed for the Hyundai Nu 2.0L G4KD engine family. It integrates the thermostat valve and water outlet into a single reinforced plastic housing unit. This assembly regulates engine coolant flow to maintain optimal operating temperature. Application coverage includes 2011-2014 Hyundai Sonata, 2011-2014 Hyundai Santa Fe Sport, 2011-2014 Kia Optima, and 2011-2014 Kia Sportage equipped with the 2.0L engine. The housing features precision molded coolant passages and O-ring sealing surfaces to prevent leakage. It supersedes part number 25600-2G540. Installation requires standard hand tools and coolant refill per manufacturer service procedures.