Genuine OEM Audi Engine Breather Line, part number 8W0121081CF. This essential component is responsible for routing gases or vapors within the engine system, ensuring proper crankcase ventilation and emissions control. It is a flexible hose, measuring 355mm in length and weighing 0.028 kg. Genuine OEM hoses and lines are manufactured from materials resistant to oil, heat, and pressure, ensuring correct routing geometry, leak-free operation, and long-term reliability within the engine environment.