Genuine OEM Audi Intake Manifold Vacuum Unit, part number 079133159J. This critical component is responsible for controlling the operation of the intake manifold changeover, which optimizes airflow dynamics for improved engine performance and efficiency. It is typically located on or near the intake manifold assembly. Weighing approximately 0.0374 kg, this unit is engineered for precise and reliable pneumatic control. Using a genuine OEM vacuum unit ensures accurate calibration, proper response to engine vacuum signals, and long-term durability, which is essential for maintaining optimal engine power and fuel economy.