Genuine OEM Audi Coolant Regulator, part number 06B121111L. This sophisticated component is vital for managing the flow of engine coolant throughout the cooling system, ensuring the engine maintains optimal operating temperatures. It often integrates the thermostat and various coolant passages into a single assembly. Constructed from durable, heat-resistant plastic, it weighs approximately 0.51 kg and measures 0.17 meters in length. Choosing a genuine OEM coolant regulator ensures precise flow control, correct sensor integration, and leak-free operation, which are critical for preventing engine damage and maintaining overall vehicle performance.