1. Verify that the joint shaft is not twisted or cracked.
2. Turn the joint shaft by hand and verify that the bearing rotates smoothly and freely.

Drive shaft
Joint shaft removal/installationMazda 6 Service Manual: Recommended Tire Inflation Pressure
On the tire label you will find the recommended tire inflation pressure in both
kPa and psi for the tires installed as original equipment on the vehicle. It is
very important that the inflation pressure of the tires on your vehicle is maintained
at the recommended pressure.
You should check t ...
Mazda 6 Service Manual: Side Air Bags
The side air bags are mounted in the outboard sides of the front seatbacks.
When the air bag crash sensors detect a side impact of greater than moderate
force, the system inflates the side air bag only on the side in which the vehicle
was hit. The side air bag inflates quickly to reduce injury ...