Rear Power Window Regulator Removal/Installation

Fully lower the rear door glass.
Disconnect the negative battery cable.
Remove the rear door trim. (See REAR DOOR TRIM REMOVAL/INSTALLATION ).
Remove the service hole cover.
Remove the rear door speaker. (See REAR DOOR SPEAKER REMOVAL/INSTALLATION ).
Remove the glass guide. (See REAR DOOR QUARTER GLASS REMOVAL/INSTALLATION ).
Remove the rear power window motor. (See POWER WINDOW MOTOR REMOVAL/INSTALLATION ).
Remove the rear door glass. (See REAR DOOR GLASS REMOVAL/INSTALLATION ).

Fig 1: Identifying Rear Door Quarter Glass And Hole Cover
Courtesy of MAZDA MOTORS CORP.
Remove the nuts.
Insert a hand through the speaker installation hole, rotate the drum housing in the direction shown in the figure to detach the tabs from the rear door module.

Fig 2: Rear Door Quarter Glass And Nuts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.

Fig 3: Rotating Drum Housing
Courtesy of MAZDA MOTORS CORP.
Remove the rear power window regulator through the speaker installation hole.
Install in the reverse order of removal.
CAUTION:
- Make sure the cable does not unspool from the drum housing when installing.
  
  Fig 4: Removing Rear Power Window Regulator Through Speaker Installation Hole
  Courtesy of MAZDA MOTORS CORP.