Genuine OEM Audi Return Coolant Pipe, part number 03C121070M. This pipe is an essential component of the engine cooling system, responsible for returning heated coolant to the radiator for efficient heat dissipation. It is strategically routed within the engine bay to connect various cooling system components. Weighing approximately 0.41 kg, this pipe is designed for durability and precise fitment. Selecting a genuine OEM return coolant pipe ensures correct routing geometry, resistance to high temperatures and pressures, and leak-free operation for optimal engine thermal management.