Genuine OEM Audi Engine Oil Pressure Switch, part number 038919081P. This vital sensor continuously monitors the engine's oil pressure, sending signals to the vehicle's engine control unit and dashboard warning light. It is typically installed in the engine block or oil system. The switch is designed to activate a warning if oil pressure drops below a safe operating threshold. Choosing genuine OEM ensures precise calibration and electrical signal characteristics, which are essential for accurate pressure detection and preventing severe engine damage.