WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.
Install in the reverse order of removal.
NOTE:
Do not install G sensor in the wrong direction. There is an arrow mark on the sensor showing which side faces the vehicle front.