Genuine OEM Audi Auxiliary Heater, part number 4G0819011A. This component is designed to provide supplemental heat for either the engine or the cabin, enhancing comfort and aiding in engine warm-up. It is typically integrated into the vehicle's heating and ventilation system. Weighing 0.627 kg, this unit ensures precise temperature regulation. Using a genuine OEM heater guarantees proper electrical integration and efficient heat transfer, preventing system malfunctions.