Genuine OEM Audi Engine Coolant Hose, part number 4M0121449BK. This hose is designed to reliably carry engine coolant between various cooling system components, maintaining optimal engine operating temperatures. It is a small, curved hose within the complex cooling circuit. Weighing only 0.0455 kg and measuring approximately 0.155m in length, it is made from high-quality, heat-resistant rubber. A genuine OEM coolant hose guarantees the correct material composition, pressure rating, and precise fitment to prevent leaks and ensure the integrity of the cooling system.