Genuine OEM Audi Rear Engine Coolant Hose, part number 8K0121081BC. This complex hose assembly is designed to transfer coolant to and from components located at the rear of the engine, playing a critical role in the overall thermal management system. Positioned at the rear of the engine, its specific routing ensures efficient coolant circulation. Weighing approximately 0.055 kg and measuring 0.57 meters in length, it is engineered for precise fitment. Choosing a genuine OEM hose guarantees the correct material composition, flexibility, and resistance to high temperatures and pressures, which are essential for preventing leaks and ensuring reliable engine cooling.