Ford 2003 Mustang Workshop Manual page 3831

SECTION 501-14A: Handles, Locks, Latches and Mechanisms
REMOVAL AND INSTALLATION
Lock Cylinder —Door
Removal
1. NOTE: Individual lock cylinders are repaired by discarding the inoperative cylinder and building
a new lock cylinder using the appropriate lock repair package. The lock repair package includes
a detailed instruction sheet to build the new lock cylinder to the current key code of the vehicle.
Remove the door trim panel (23942). For additional information, refer to
2. Using a screwdriver, release the lock cylinder actuating rod.
3. Remove the door lock cylinder retainer.
4. Remove the door lock cylinder (21990).
5. If necessary, transfer the lock cylinder arm to the new door lock cylinder (21990).
2003 Mustang Workshop Manual
Section 501-05 .