Genuine OEM Audi Additional Heater Pipe, part number 4E0265235C. This pipe is responsible for supplying fluid to an auxiliary heating unit, contributing to the vehicle's climate control system. It is part of the complex network of heating and cooling lines. Weighing 0.47 kg and measuring 0.62 m in length, this pipe is designed for durability and precise routing. Using a genuine OEM pipe ensures proper fluid flow and resistance to temperature and pressure fluctuations, preventing leaks and maintaining heating system efficiency.