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 AdjusterControl Valve Body Removal/Installation [Fw6 A EL]
On-Vehicle Removal
WARNING:
A hot transaxle and ATF can cause severe burns. Turn off the engine and wait
until they are cool.
Using compressed air can cause dirt and other particles to fly out, causing
injury to the eyes. Wear protective eyeglasses whenever using compressed ai ...
Liftgate Adjustment
1. Measure the gap and height difference between the liftgate and the body.
2. Loosen the liftgate hinge installation bolts and adjust the gap by moving
the liftgate.
Standard clearance
a: 5.0―7.0 mm {0.20―0.27 in}
b: -2.0―0 mm {-0.078―0 in}
...
Front Bumper Disassembly/Assembly
Standard Type
Except SKYACTIV-G 2.0
1. Disassemble in the order indicated in the table.
1
Screw A
2
Guard cover
3
Screw B
4
Fastener C
5
Intake air guide
...