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: Seat Warmer (Some models)
The front seats are electrically heated. The ignition must be switched ON.
Press the seat warmer switch while the ignition is switched ON to operate the
seat warmer. The indicator lights turn on to indicate that the seat warmer is operating.
The mode changes as follows each time the seat warmer ...
Mazda 6 Service Manual: Front shock absorber disposal
Warning
Whenever drilling into a shock absorber, wear protective eye wear.
The gas in the shock absorber is pressurized, and could spray metal chips
into the eyes and face when drilling.
1. Clamp a shock absorber on a flat surface or with the piston pointing
downwards.
2. Drill a 2-3 ...