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 AdjusterBack Up Light Switch Removal/Installation [A26 M R]
1. Disconnect the negative battery cable.
2. Disconnect the back-up light switch connector.
3. Remove the aerodynamic under cover No.2..
4. Remove the back-up light switch with the gasket.
5. Install a new gasket and the back-up light switch to the transaxle case.
Tightening torque ...
Liftgate Upper Trim Removal/Installation
1. Detach tab while pulling the liftgate upper trim in the direction of the arrow
(1) shown in the figure, then detach clips and pin while pulling in the direction
of the arrow (2).
2. Detach tab while pulling the liftgate upper trim in the direction of the arrow
(3) shown in the figure, ...
BSM OFF Switch
When the BSM OFF switch is pressed, the
Blind Spot Monitoring (BSM) and Rear
Cross Traffic Alert (RCTA) systems are
turned off and the BSM OFF Indicator
Light in the instrument cluster turns on.
If the switch is pressed again, the Blind
Spot Monitoring (BSM) and Rear Cross
Traffic Alert ...