1. Remove the clamps and vacuum hose.
2. Apply both suction and pressure to the engine-side hose, and verify that air blows only toward that side.

Air bleeding
Brake pedal inspectionMazda 6 Service Manual: Sunroof motor inspection
Motor
1. Remove the sunroof motor.
2. Apply battery positive voltage to the sunroof motor terminals and inspect
the operation of the sunroof motor.
If not as specified, replace the sunroof motor.
Limit Switch
1. Remove the headliner. (See HEADLINER REMOVAL/INSTALLATION.)
2. Verify t ...
Mazda 6 Service Manual: Uniform Tire Quality Grading System (UTQGS)
This information relates to the tire grading system developed by the U.S. National
Highway Traffic Safety Administration for grading tires by tread wear, traction,
and temperature performance.
Tread Wear
The tread wear grade is a comparative rating based on the wear rate of the tire
when tes ...