Genuine OEM Audi Airbag Control Unit, part number 5Q0959655AC. This central control module is responsible for monitoring various impact sensors throughout the vehicle and determining when and how to deploy the airbag system in the event of a collision. It is a critical safety component, typically located within the vehicle's cabin structure. Genuine OEM units come with the correct firmware and calibration, ensuring the airbag system functions as designed to protect occupants.