Genuine OEM Audi Engine Breather Hose, part number 059103221AL. This essential hose is part of the engine's crankcase ventilation system, designed to safely vent crankcase gases and maintain optimal engine pressure. It connects to the engine cover assembly, ensuring proper routing and sealing. The hose is precisely formed with specific bends to fit its designated location without kinking. Using a genuine OEM breather hose guarantees the correct material composition for resistance to oil and heat, precise routing geometry, and proper sealing, which are critical for engine health and emissions compliance.