Front Door

Raise the glass assembly - front door to the top position.
Remove the trim panel - front door. Ref. to EXTERIOR/INTERIOR TRIM > Door Trim > -- > FRONT DOOR .
Remove the sealing cover - front door.
CAUTION:
- Carefully remove the butyl tape. Excessive force will easily break the sealing cover - front door.
- If the sealing cover - front door gets broken, replace it with a new part.
- Be careful not to allow the butyl tape to contact any trims and seats because the butyl tape, which has a strong adhesive force, is difficult to remove once it adhered.
1. Disconnect connectors.
2. Carefully remove the butyl tape and turn over the sealing cover - front door within the area where the operation can be performed.
Fig 1: Identifying Front Door Sealing Cover
Courtesy of SUBARU OF AMERICA, INC.
Remove the cover - handle front outer.
Preparation tool:

TORX® T30
1. Remove the plug at the rear end of the panel assembly - front door.
2. Loosen the TORX® bolt and remove the cover - handle front outer.
Fig 2: Removing Handle Front Outer Cover
Courtesy of SUBARU OF AMERICA, INC.
Remove the key cylinder (B) from the cover - handle front outer (A), and replace the key cylinder.

Fig 3: Identifying Key Cylinder Cover And Handle Front Outer
Courtesy of SUBARU OF AMERICA, INC.
Install each part in the reverse order of removal.
Tightening torque:

Refer to "COMPONENT" of "General Description". Ref. to SECURITY AND LOCKS > General Description > DOOR LOCK ASSEMBLY .