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 AdjusterTowing
Proper lifting and towing are necessary to prevent damage to the vehicle.
Government and local laws must be followed.
A towed vehicle usually should have its drive wheel (front wheels) off the
ground. If excessive damage or other conditions prevent this, use wheel dollies.
...
Starter Interlock Switch Inspection [Mzr 2.3 Disi Turbo]
CAUTION:
Do not reuse the starter interlock switch if it is removed from the vehicle
even once. Replace with a new starter interlock switch when installing.
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Disconnect the starter interlock switch connec ...
Rear Bumper Disassembly/Assembly
1. Remove the License plate lights..
2. Disassemble in the order indicated in the table.
1
Fastener A
2
Bracket
3
Screw B
4
Reflector
(See Reflector Removal Note)
5 ...