Genuine OEM Audi Engine Vacuum Line, part number 4M0131051D. This essential component is responsible for maintaining proper engine vacuum, which is crucial for the operation of various engine systems, including braking assistance, emissions control, and turbocharger regulation. It is positioned within the engine bay, forming part of the complex network of vacuum lines. Weighing approximately 0.113 kg, this line is designed for precise routing and connection. Genuine OEM vacuum lines are manufactured from high-quality, durable materials to ensure a leak-free seal and consistent vacuum pressure, which is vital for engine performance and reliability.