Genuine OEM Volkswagen Engine Coolant Hose, part number 1K0121101CK. This multi-branch hose assembly is a critical component of the engine cooling system, responsible for transporting coolant between various engine components to maintain optimal operating temperature. Its complex, pre-formed shape ensures correct routing and connection points within the engine bay. Using a genuine OEM coolant hose guarantees resistance to high temperatures and pressures, preventing leaks and ensuring the integrity of the cooling system.