Models With Keyless Access

WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Immobilizer antenna is integrated with the push button ignition switch.

Remove the cover assembly - instrument panel LWR driver. < Ref. to REMOVAL , Instrument Panel Lower Cover. >
Remove the push button ignition switch.
1. Disconnect the connector, and remove the aspirator hose.
  
  Fig 1: Locating Push Button Ignition Switch
  Courtesy of SUBARU OF AMERICA, INC.
2. Release the claws, and then remove the panel - switch.
3. Release the claws, and then remove the push button ignition switch from the panel - switch.
  
  Fig 2: Identifying Push Button Ignition Switch From Panel - Switch
  Courtesy of SUBARU OF AMERICA, INC.