Genuine OEM Volkswagen Coolant Hose, part number 4M0122101CJ. This hose is a critical component responsible for transporting coolant throughout the engine and cooling system, ensuring precise regulation of engine temperature. It is located in the engine cooling assembly. Constructed from high-quality rubber and reinforced materials, it is designed to withstand high temperatures and pressures, preventing leaks and maintaining system integrity for optimal engine performance and longevity.