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: Sunshade
The sunshade can be opened and closed by hand.
The sunshade opens automatically when the moonroof is opened, but must be closed
by hand.
CAUTION
The sunshade does not tilt. To avoid damaging the sunshade, do not push
up on it.
Do not close the sunshade while the moonroof is opening. T ...
Mazda 6 Service Manual: Technical data
ENGINE
LUBRICATION SYSTEM
Note
The maintenance intervals on scheduled maintenance table (See
SCHEDULED MAINTENANCE TABLE) can only be supported by the use of following
oils.
Recommended engine oil
COOLING SYSTEM
FUEL AND EMISSION CONTROL SYSTEMS
ENGINE ELECTRICAL SYSTEM
...