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: Stopping The Smart Brake Support (SBS) System Operation
The Smart Brake Support (SBS) system can be temporarily deactivated.
When the Smart Brake Support (SBS) system is turned off, the Smart Brake Support
(SBS) OFF indicator light turns on.
When the engine is restarted, the system becomes operational.
NOTE
If the Smart Brake Support (SBS) system ...
Mazda 6 Service Manual: Displayable Range on the Screen
The images on the screen may be different from the actual conditions.
NOTE
The displayable range varies depending on the vehicle and road conditions.
The displayable range is limited. Objects under the bumper or around
the bumper ends cannot be displayed.
The distance appearing in the ...