4 Door

Fully lower the rear door glass.
Remove the rear beltline molding. (See REAR BELTLINE MOLDING REMOVAL/INSTALLATION ).
Adjust the door glass position as shown in the figure.
Disconnect the negative battery cable. (Vehicles with power window system)
Remove the regulator handle. (Vehicles with manual window system) (See REGULATOR HANDLE REMOVAL ).
Remove the rear door trim. (See REAR DOOR TRIM REMOVAL/INSTALLATION ).

Fig 1: Adjusting Door Glass
Courtesy of MAZDA MOTORS CORP.
Remove the bolts and screw.

Fig 2: Removing Door Glass & Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the rear door glass guide and glass run channel as a single unit.
Remove the hole cover.

Fig 3: Removing Rear Door Glass Guide
Courtesy of MAZDA MOTORS CORP.
Remove the screw.
Lift the rear door glass up and remove while tilting it.
Install in the reverse order of removal.

Fig 4: Removing Rear Door Glass & Lifting Glass
Courtesy of MAZDA MOTORS CORP.