1. Measure the gap and height between the front or rear door and the body.
2. If not as specified, loosen the front or rear door hinge installation bolts or the door lock striker installation screws, and reposition the door.
Clearance
a: 2.5-4.5 mm {0.10-0.18 in} b: -0.8-1.2 mm {-0.03-0.05 in} c: -0.3-1.7 mm {-0.01-0.07 in} d: -1.0-1.0 mm {-0.04-0.04 in} e: -0.5-1.5 mm {-0.02-0.06 in}

3. Tighten the bolts or screws.
Rear door removal/installation
Front door glass removal/installationMazda 6 Service Manual: Intermittent concern troubleshooting
Vibration Method
1. If malfunction occurs or becomes worse while driving on a rough road or
when engine is vibrating, perform the steps below.
Note
There are several reasons vehicle or engine vibration could cause
an electrical malfunction. Some of the things to check for are:
...
Mazda 6 Service Manual: Operation of Automatic Air-conditioning
1. Press the AUTO switch. Selection of the airflow mode, air intake selector
and amount of airflow will be automatically controlled.
2. Use the temperature control dial to select a desired temperature. Press the
DUAL switch or turn the front passenger temperature control dial to control the
s ...