Trunk Lid

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.

Remove the trunk lid trim. Refer to TRUNK ROOM TRIM .
Remove the key cylinder.
1. Remove the cable (1), clip (2) and bolt (3).
  
  Fig 1: Identifying Key Cylinder Cable, Clip And Bolt
  Courtesy of SUBARU OF AMERICA, INC.
2. Remove the key cylinder from the trunk lid, and replace the key cylinder.
  
  Fig 2: Removing Key Cylinder From Trunk Lid
  Courtesy of SUBARU OF AMERICA, INC.

Tightening torque:

Key cylinder: 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)