Genuine OEM Audi Evaporation Emission Leak Indicator Pump, part number 3C0906201A. This crucial component is part of the evaporative emissions system, responsible for detecting leaks in the fuel vapor recovery system. It operates by pressurizing the system and monitoring for pressure drops, ensuring environmental compliance and preventing fuel vapor from escaping. Weighing 0.528 kg, this pump is a complex electromechanical unit. Choosing genuine OEM ensures correct calibration, reliable leak detection, and seamless integration with the vehicle's emissions control module.