Genuine OEM Audi Pressure Canister Vacuum Tank, part number 7M0129808. This component serves as a reservoir for vacuum pressure, which is essential for the operation of various engine systems, including brake boosters, EGR valves, and turbocharger controls. It helps to stabilize vacuum levels and provide consistent vacuum supply when engine demand fluctuates. This black plastic canister is typically located in the engine bay. Weighing 0.082 kg, it is designed to maintain a sealed environment. Using a genuine OEM vacuum tank ensures proper pressure retention, correct port configurations, and long-term durability, critical for reliable engine and accessory function.