Genuine OEM Volkswagen Cooling Hose, part number 7E0121086B. This hose is a critical component of the engine cooling system, responsible for transporting coolant between various engine components to dissipate heat and maintain optimal operating temperatures. It is a small, curved hose within the complex cooling circuit. Weighing just 0.03 kg, this hose is designed for precise routing and connection. Using a genuine OEM cooling hose ensures correct routing geometry, material compatibility with coolant, and resistance to temperature and pressure fluctuations, preventing leaks and maintaining cooling system integrity.