1. Remove the rear door glass.
2. Remove the inner handle.
3. Remove the rear door speaker.
4. Disconnect the power window motor connector, and power door lock actuator connector.
5. Remove the rear door harness from the rear door unit.
6. Remove the bolts.

7. Remove the rear door lock actuator hook from the rear door unit.
8. Pull the rear door unit slightly towards you, and while keeping the power window regulator or manual window regulator from catching on the door, remove the door unit from the door.
9. Pull out the inner handle cable and door lock knob cable from the hole.
10. For power window system-equipped vehicles, remove the power window motor and power window regulator from the door unit. For manual window system-equipped vehicles, remove the regulator handle and manual window regulator.

11. Install in the reverse order of removal.
Front door unit removal/installation
Front door latch and lock actuator removal/installationMazda 6 Service Manual: Dual proportioning valve inspection (without abs)
1. Connect the SSTs to the brake pipes as shown in the figure.
2. Bleed the air from the brake system.
3. Measure the fluid pressure of the master cylinder and the rear brake.
If not within the specification, replace the dual proportioning valve.
Fluid pressure
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Mazda 6 Service Manual: No.2 air bag system warning light is illuminated all the time
Diagnostic Procedure
When performing an asterisked (*) troubleshooting inspection, shake the
wiring harness and connectors while doing the inspection to discover whether
poor contact points are the cause of any intermittent malfunction. If there
is a problem, check to make sure connec ...