Depress the button on the seat belt buckle. If the belt does not fully retract, pull it out and check for kinks or twists. Then make sure it remains untwisted as it retracts.

NOTE
If a belt does not fully retract, inspect it for kinks and twists. If it is still not retracting properly, have it inspected at an Authorized Mazda Dealer.
Fastening the Seat Belt
Front Shoulder Belt AdjusterMazda 6 Owners Manual: Power window regulator removal/installation
1. Disconnect the negative battery cable.
2. Remove the front door glass/rear door glass.
3. Remove the front door speaker/rear door speaker.
4. Remove the power window motor.
5. Remove the nuts.
6. Insert hand through the speaker installation hole, rotate the regulator
drum housing in the ...
Mazda 6 Owners Manual: No.3 passenger-side air bag cut-off indicator light does not illuminate
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 ...