Genuine OEM Audi Engine Breather Hose, part number 04E103474K. This hose is a vital component of the engine's positive crankcase ventilation (PCV) system, designed to safely vent crankcase gases and prevent pressure buildup. It ensures proper engine operation and contributes to emissions control by recirculating these gases. Weighing approximately 0.056 kg, this hose is constructed from oil-resistant rubber with integrated sealing rings. Using a genuine OEM breather hose guarantees the correct material resistance to oil and heat, precise routing, and secure connections for effective crankcase ventilation and engine longevity.