Genuine OEM Audi Engine Breather Hose, part number 059103221T. This hose is an essential part of the engine's crankcase ventilation system, designed to safely route and vent crankcase gases. It ensures proper pressure regulation within the engine and prevents the buildup of harmful contaminants. Made from durable, heat-resistant rubber, this hose is approximately 28 cm long and features a corrugated design for flexibility. Using a genuine OEM breather hose guarantees the correct material composition and routing geometry, preventing leaks and maintaining optimal engine performance and emissions compliance.