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 AdjusterAir Intake Actuator Removal/Installation [Full Auto Air Conditioner]
1. Set the air intake mode to FRESH.
2. Disconnect the negative battery cable..
3. Remove the following parts:
a. Front scuff plate (Passenger-side).
b. Front side trim (Passenger-side).
c. Dashboard under cover.
d. Glove compartment.
e. Lower panel (Passenger-side).
f. Shower duct ( ...
Cruise Control Switch Inspection [Mzr 2.0, Mzr 2.5]
1. Remove the battery cover..
2. Disconnect the negative battery cable and wait for 1 min or more..
3. Remove the driver–side air bag module..
4. Disconnect the clock spring connector (part wiring harness-side).
5. Measure the resistance between clock spring terminals K and M (part wiring ...
Front Passenger Occupant Classification System
First, please read "Supplemental Restraint System (SRS) Precautions"
carefully.
Front Passenger Seat Weight Sensor
Your vehicle is equipped with a front passenger seat weight sensors as a part
of the
supplemental restraint system. These sensors are located under both of the front
p ...