Genuine OEM Volkswagen Activated Carbon Tank Ventilation Line, part number 4M4201997G. This line is an essential component of the evaporative emissions system, responsible for safely routing fuel vapors to the activated carbon canister for processing. It sits within the fuel vapor recovery assembly, connecting the fuel tank system to the canister. Weighing approximately 1.3 kg, this line is designed for durability. Using a genuine OEM line ensures precise fitment, correct material composition for fuel resistance, and proper sealing to prevent leaks and maintain emission control system integrity.