Genuine OEM Audi Coolant Regulating Valve, part number 057121737P. This critical component is responsible for precisely controlling the flow of engine coolant through the cooling system. By regulating coolant distribution, it helps maintain the engine's optimal operating temperature, which is crucial for efficiency, performance, and longevity. Weighing 0.523 kg, this valve assembly is engineered for accurate temperature management. Using a genuine OEM regulating valve ensures precise control, proper flow characteristics, and reliable operation, preventing overheating or undercooling issues.