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.
Release the lock and remove the bulb inspection cover of trunk room trim.

Fig 1: Removing Bulb Inspection Cover Of Trunk Room Trim
Courtesy of SUBARU OF AMERICA, INC.
Remove the bulb socket and rear turn signal light bulb.

Fig 2: Removing Bulb Socket And Rear Turn Signal Light Bulb
Courtesy of SUBARU OF AMERICA, INC.