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: Aluminum Wheel Maintenance
A protective coating is provided over the aluminum wheels. Special care is needed
to protect this coating.
CAUTION
Do not use any detergent other than mild detergent. Before using any detergent,
verify the ingredients. Otherwise, the product could discolor or stain the aluminum
wheels.
NOTE ...
Mazda 6 Service Manual: Front buckle removal/installation
1. Perform the following procedure for vehicles with seat belt warning.
(1) Disconnect the negative battery cable.
(2) Remove the front seat.
(3) Disconnect the buckle switch connector.
2. Perform the following procedure for vehicles without seat belt warning.
(1) Remove the console.
...