Genuine OEM Audi Coolant Pipe with Hose, part number 04L122157BA. This integrated assembly transports coolant between various engine components, playing a critical role in maintaining optimal engine operating temperature. It is positioned within the engine cooling system. Weighing 0.612 kg and measuring 0.59 m in length, this complex unit combines rigid pipe sections with flexible hoses. Genuine OEM coolant pipe and hose assemblies ensure correct routing geometry, material compatibility, and resistance to thermal and pressure stresses, preventing leaks and maintaining cooling system integrity.