Genuine OEM Volkswagen Coolant Regulator with Water Pump, part number 06H121026DR. This integrated unit is responsible for both regulating the flow of coolant and circulating it throughout the engine's cooling system, maintaining optimal operating temperatures. It is typically mounted on the engine block. Constructed from durable metal and high-grade plastic components, this assembly weighs 1.236 kg. Choosing a genuine OEM coolant regulator and water pump ensures precise temperature control, efficient coolant circulation, and long-term reliability, preventing engine overheating and damage.