Genuine OEM Audi Secondary Air Injection Pump, part number 079959231L. This pump introduces fresh air into the exhaust system, a critical function for reducing harmful emissions and ensuring the catalytic converter operates efficiently. It is an integral part of the vehicle's emissions control system. Weighing 1.668 kg, this unit is built to factory specifications. Choosing a genuine OEM pump ensures precise air delivery and long-term reliability, maintaining compliance with emissions standards.