Buy 2003 Subaru Outback 2.5L MT Door Lock Kit. LATCH/ACT Door (Left, Front). Door Lock Cylinder If Cylinder, Don, HANDLE - OEM Subaru Part # 61032AE05A

Mechanism to secure Door to Chassis.

LATCH ASSEMBLY-FRONT DOOR,LEFT Door Lock KitDoor Latch Assembly

Fits Baja, Legacy, Outback

Door Lock Cylinder
If your keys don't turn in your door, you might need to replace the door lock cylinder in your 2003 Subaru Outback.