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: How to Use Stitcher™ Radio
What is Stitcher™ Radio?
Stitcher™*1 radio is an application which can be used to listen to Internet radio
or stream podcasts.
Recommended content is automatically selected by registering content which you
put into your favorites, or by pressing the Like or Dislike button.
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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
...