Genuine OEM Audi Engine Coolant Hose, part number 4M0121550D. This hose is designed to transport coolant efficiently within the engine cooling system, maintaining optimal engine operating temperatures. It is a critical component in the vehicle's thermal management system. Weighing 0.09 kg with dimensions of 0.23m x 0.075m x 0.08m, this hose is engineered for precise fit and durability. Choosing genuine OEM ensures the correct routing geometry, material composition, and resistance to extreme temperatures and pressures for leak-free and reliable performance.