Steering Lock

Disconnect the ground terminal from the battery sensor, and wait for at least 60 seconds before starting work. <Ref. to BATTERY , NOTE, Repair Contents.>
Remove the cover assembly - column.
1. Release the clips, and remove the cover assembly - steering UPR.
2. Remove the screws.
3. Release the claw, and remove the cover assembly - column UPR and the cover assembly - column LWR.
  
  Fig 1: Removing Cover Assembly - Column
  Courtesy of SUBARU OF AMERICA, INC.
Remove the immobilizer antenna assembly. <Ref. to REMOVAL , Immobilizer Antenna.>
Release the claws, and pull the key warning switch downwards to remove.

Fig 2: Identifying Key Warning Switch And Claws
Courtesy of SUBARU OF AMERICA, INC.
Remove the screws and remove the key lock solenoid.

Fig 3: Locating Key Lock Solenoid Screws
Courtesy of SUBARU OF AMERICA, INC.
Remove the key lock solenoid.
1. Disconnect the connector.
2. Remove the screws and remove the key lock solenoid.
  
  Fig 4: Removing Key Lock Solenoid
  Courtesy of SUBARU OF AMERICA, INC.
Replace the key cylinder.
1. Insert the key into the key cylinder, and turn the key to the ACC position.
2. Insert a flat tip screwdriver from the steering lock frame hole (A), and pull the key cylinder until the key cylinder claws touch the steering lock frame stopper (B).
  
  Fig 5: Pulling Steering Lock Frame Stopper
  Courtesy of SUBARU OF AMERICA, INC.
3. Insert a flat tip screwdriver from the steering lock frame hole (A), and release the claws to pull out the key cylinder.
  
  Fig 6: Pulling Out Key Cylinder
  Courtesy of SUBARU OF AMERICA, INC.