Front Door Key Cylinder Removal/Installation

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the service hole cover.

Fig 1: Removing Service Hole Cover
Courtesy of MAZDA MOTORS CORP.
Detach the screw from the front door key cylinder.

Fig 2: Detaching Screw From Front Door Key Cylinder
Courtesy of MAZDA MOTORS CORP.
NOTE:
- The screw cannot be removed because the front outer handle bracket has a stopper which prevents the screw from falling.
While pressing the outer handle bracket tab in the direction of arrow (1) shown in the figure, pull the front door key cylinder in the direction of arrow (2) to detach the outer handle bracket and the front door key cylinder.

Fig 3: Pulling Front Door Key Cylinder (Mentioned Direction)
Courtesy of MAZDA MOTORS CORP.
Remove the front door key cylinder from the outer handle bracket.
Insert a tape-wrapped flathead screwdriver into the position shown in the figure.

Fig 4: Removing Front Door Key Cylinder Using Flathead Screwdriver
Courtesy of MAZDA MOTORS CORP.
Move the tape-wrapped flathead screwdriver in the direction of the arrow shown in the figure to lift up the collar cap, and detach the collar cap from the front door key cylinder tab.
Remove the collar cap from the front door key cylinder.
Install in the reverse order of removal.