4 Door

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

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.

Fig 1: Rear Door Glass Position For Removal (4 Door)
Courtesy of MAZDA MOTORS CORP.
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 .)
Remove the bolts and screw.

Fig 2: Rear Door Glass Bolts & Screws (4 Door) With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the rear door glass guide and glass run channel as a single unit.

Fig 3: Rear Door Glass Guide & Glass Run Channel (4 Door)
Courtesy of MAZDA MOTORS CORP.
Remove the hole cover.
Remove the screw.
Lift the rear door glass up and remove while tilting it.

Fig 4: Rear Door Glass (4 Door)
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.