Genuine OEM Audi Control Unit Retainer, part number 8Y0907390. This component is designed to securely hold an electronic control unit in its designated mounting position. It is typically located on the rear right side of the vehicle. Constructed from robust plastic, it ensures a precise and stable fit for the control module. Using a genuine OEM retainer guarantees the correct mounting and protection for sensitive electronic components, preventing vibration damage and ensuring long-term reliability.