Genuine OEM Volkswagen Control Unit Retainer, part number 7T0971806. This part is designed to securely hold an electronic control unit (ECU) in its designated location within the vehicle, preventing vibration and ensuring its proper function. It is identified as part 3 in the diagram, securing a control module. Genuine OEM retainers are manufactured to exact specifications for fit and material strength, ensuring the long-term security of critical electronic components.