Vacuum Sensor -G608-, REMOVING AND INSTALLING: Installing
WARNING: This page is about a different car, the 2016 Audi A3 and 2015 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
Install in reverse order of removal and note the following:
-- Push in the Vacuum Sensor -G608- until it engages audibly.
-- Install the check valve. Refer to CHECK VALVE, REMOVING AND INSTALLING .