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: Driving Position Memory (Some models)
The desired driving position can be called up after programming the position.
The following driving positions can be programmed.
Driver’s seat position (seat slide, height adjustment, front edge of seat
bottom, seat recline)
Active driving display (display position, brightness level, dis ...
Mazda 6 Service Manual: No.1 while vehicle is in reverse, vehicle locator mark goes forward
When performing an asterisked (*) troubleshooting inspection, shake the
wiring harness and connectors while doing the inspection to discover whether
poor contact points are the cause of any intermittent malfunction. If there
is a problem, check to make sure connectors, terminals and wiri ...