Knock Sensor 1 -G61-, REMOVING AND INSTALLING: Installing
WARNING: This page is about a different car, the 2022 Audi A4 Quattro and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Install in the reverse order of removal while noting the following:
-- Install the Engine Temperature Control Actuator -N493-. Refer to Engine Temperature Control Actuator -N493-, REMOVING AND INSTALLING .