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: Camshaft position (cmp) sensor inspection
Caution
When foreign material such as an iron chip is on the CMP sensor,
it can cause abnormal output from the sensor because of flux turbulence and
adversely affect the engine control. Be sure there is no foreign material on
the CMP sensor when replacing.
Note
Perform the follow ...
Mazda 6 Service Manual: Front shock absorber inspection
1. Remove the front shock absorber from the vehicle.
2. Inspect for damage and oil leakage.
3. Inspect the rubber bushing for deterioration and wear.
4. Compress and extend the shock piston at least three times. Verify that the
operational force does not change and that there is no unusual nois ...