Sedan model

WARNING: This page is about a different car, the 2012 Subaru Outback and 2012 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the ground cable from battery.
Remove the rear shelf trim. Refer to REAR SHELF TRIM .
Remove the TPMS & keyless control module.
1. Disconnect the connector.
2. Remove the bolt and then remove the TPMS & keyless control module.
  
  Fig 1: Removing TPMS & Keyless Control Module (Sedan Model)
  Courtesy of SUBARU OF AMERICA, INC.