Genuine OEM Audi Engine Vacuum Hose, part number 03L131552D. This hose is responsible for transporting vacuum within the engine system, supporting various functions such as brake boosting or emissions control. It is integrated into the engine's complex network of lines. Weighing 0.0115 kg and measuring 0.345 m in length, it is made from flexible, durable rubber or plastic. Using a genuine OEM hose ensures correct routing geometry, precise pressure regulation, and resistance to engine fluids and temperatures, critical for optimal engine performance and reliability.