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 AdjusterPassenger Side Air Bag Module Removal/Installation [Standard Deployment Control
System]
WARNING:
Handling the air bag module improperly can accidentally deploy the air bag
module, which may seriously injure you. Read the air bag system service warnings
and cautions before handling the air bag module..
NOTE:
When replacing the passenger-side air bag module af ...
Vanity Mirror Illumination Bulb Removal/Installation
1. Disconnect the negative battery cable..
2. Insert a tape-wrapped fastener remover into the service hole, and pry it in
the direction indicated by the arrow to remove the lens.
3. Remove the vanity mirror illumination bulb.
4. Install in the reverse order of removal. ...
Operational Range
WARNING
Always take all children and pets with
you or leave a responsible person with
them:
Leaving a child or a pet unattended in
a parked vehicle is dangerous. In hot
weather, temperatures inside a vehicle
can become high enough to cause
brain damage or even death.
...