Subaru 2009 IMPREZA Service Manual page 3231

Roof Trim
EXTERIOR/INTERIOR TRIM
16) Remove the clips, and then remove the roof
trim.
EI-01818
17) Open the passenger's side door all the way,
and maintain at that position.
18) Take out the roof trim from the passenger's
side opening.
NOTE:
Rotate the roof trim to go through the gap between
the front accessory socket and airbag control unit.
B: INSTALLATION
Install in the reverse order of removal.
EI-65