1. Verify that there is no torsion or cracks on the joint shaft.
If there is any malfunction, replace the joint shaft.
2. Turn the joint shaft by hand and verify that the bearing rotates smoothly.

If there is any malfunction, replace the joint shaft.
Joint Shaft Disassembly [Skyactiv G 2.0]
Joint Shaft Removal/Installation [Mzr 2.0, Mzr 2.3 Disi Turbo, Mzr 2.5]Passenger 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 ...
Engine SST [Mzr 2.3 Disi Turbo]
1: Mazda SST number
2: Global SST number
Example
1:49 UN30 3328
2:303–328
Rear oil seal replacer
1:–
2:303–507
Crankshaft TDC timing pin
1:49 UN30 310610
2:303–1061
Camshaft
alignment timing tool
...
How the SRS Air Bags Work
Your Mazda is equipped with the following types of SRS air bags. SRS air bags
are
designed to work together with the seat belts to help to reduce injuries during
an accident.
The SRS air bags are designed to provide further protection for passengers in
addition to the
seat belt functions. ...