Genuine OEM Audi Vacuum Reservoir, part number 4F0131541A. This component is crucial for maintaining a stable vacuum supply within the engine's vacuum system, supporting functions such as emissions control, brake boosting, and intake manifold runner adjustments. It acts as a buffer to ensure consistent vacuum pressure. Weighing 0.111 kg, this reservoir is engineered to precise specifications for reliable operation. Choosing genuine OEM ensures correct pressure retention, material integrity, and seamless integration with the vehicle's complex vacuum network, preventing performance issues and system malfunctions.