Outback Model

Disconnect the ground cable from battery and wait for at least 60 seconds before starting work.
CAUTION: The airbag system is fitted with a backup power supply. After disconnecting the battery ground cable, the airbag may deploy if you do not wait for 60 seconds before starting the service of airbag system.
Remove the rear seat cushion assembly.
1. Pull up the seat cushion and release the hook.
  CAUTION: If the hook is disconnected from the vehicle body, replace the hook with the new part to prevent the decline of the fixed force of the seat.
  
  Fig 1: Identifying Rear Seat Cushion Assembly Hook
  Courtesy of SUBARU OF AMERICA, INC.
  
  Fig 2: Pulling Up Seat Cushion
  Courtesy of SUBARU OF AMERICA, INC.
2. Remove the hook (A) by pushing it back while lifting the front side of the seat cushion, and remove the seat cushion assembly.
Fig 3: Lifting Front Side Of Seat Cushion
Courtesy of SUBARU OF AMERICA, INC.
Release the clips and claws, and then remove the side sill cover - rear INN. (On the side where airbag sensor is removed)
CAUTION: Do not pull with excessive force. Doing so may damage the claws of the side sill cover INN.

Fig 4: Identifying Side Sill Cover - Rear INN Removing Sections
Courtesy of SUBARU OF AMERICA, INC.

NOTE: To release the claws of the side sill cover INN, the following steps are recommended.
1. Take out the weather strip from under the side sill cover INN.
2. Turn over the floor mat and release the claw (C-C and D-D) by accessing from behind the side sill cover INN.
Tilt the backrest forward, and then turn over the backrest backside mat.

Fig 5: Turning Over Backrest Backside Mat
Courtesy of SUBARU OF AMERICA, INC.
Remove the backrest side pad assembly. (On the side where airbag sensor is removed)
1. Disconnect the backrest cable and reclining lever cable.
2. Remove the screws and remove the reclining lever assembly by pulling it downward.
  Preparation tool: Stubby screwdriver
  
  Fig 6: Removing Backrest Side Pad Assembly
  Courtesy of SUBARU OF AMERICA, INC.
3. Turn over the bottom end of the backrest side pad in the forward direction so that the claws are released.
4. Remove the backrest side pad by pulling it up.
Fig 7: Pulling Backrest Side Pad
Courtesy of SUBARU OF AMERICA, INC.
Remove the clips, and remove the luggage floor box and rear floor edge cover.

Fig 8: Identifying Luggage Floor Box And Rear Floor Edge Cover Clips
Courtesy of SUBARU OF AMERICA, INC.
Remove the rear quarter trim LWR. (On the side where airbag sensor is removed)
1. Remove the caps, screws, and bolts. (A), (C)
2. Take out the hook and remove the screw inside. (B)
3. Remove the clips, and remove the rear quarter trim LWR.
Fig 9: Identifying Rear Quarter Trim LWR Clips
Courtesy of SUBARU OF AMERICA, INC.
Remove the nut and then remove the curtain airbag sensor assembly.
1. Push the lock arm.
2. Holding outer part, pull it one step in the direction of arrow.
3. Push the lock arm again.
4. Holding outer part, pull it in the direction of arrow to disconnect the connector.
Fig 10: Pulling Curtain Airbag Sensor Assembly Connector
Courtesy of SUBARU OF AMERICA, INC.