Genuine OEM Audi Engine Crankcase Vent Hose, part number 4L0129295B. This component is designed to allow gases to escape from the engine's crankcase, playing a critical role in the positive crankcase ventilation (PCV) system. It helps manage internal engine pressure and prevent oil contamination. With dimensions of 0.185m length, 0.05m width, and 0.038m height, and weighing 0.07 kg, it ensures proper gas flow. Using a genuine OEM vent hose guarantees correct material flexibility and resistance to oil and heat, maintaining engine health and emissions compliance.