Genuine OEM Audi Coolant Pipe, part number 4H0121485S. This pipe is crucial for directing coolant flow throughout the engine cooling system, maintaining proper engine operating temperature. It is specifically positioned on the rear right side of the engine assembly. Weighing 0.17 kg, this pipe is manufactured to exact factory dimensions for a perfect fit and leak-free operation. Choosing a genuine OEM coolant pipe ensures correct routing geometry, material integrity, and long-term durability, preventing leaks and maintaining cooling system efficiency.