Genuine OEM Audi Coolant Controller With Coolant Pump, part number 06H121026DS. This integrated unit is a vital component of the engine cooling system, responsible for regulating coolant flow and actively pumping coolant throughout the engine. It ensures optimal operating temperatures, preventing overheating or undercooling. Weighing approximately 1.37 kg, this complex assembly requires precise calibration. Choosing a genuine OEM unit guarantees correct flow rates, sensor accuracy, and seamless integration with the vehicle's thermal management system for reliable engine cooling.