Genuine OEM Audi Engine Breather Line, part number 07L103217B. This line is a critical component of the crankcase ventilation system, allowing harmful engine gases to escape the crankcase and be recirculated or filtered. It connects various points within the engine's ventilation system. This lightweight hose, weighing approximately 0.05 kg, is designed for flexibility and resistance to oil and heat. Using a genuine OEM breather line ensures correct routing, proper sealing, and resistance to engine fluids and temperatures, preventing leaks and maintaining engine health.