Two separate circuits
Your vehicle has two separate circuit brake systems. Each circuit works diagonally across the vehicle. If one circuit of the brake system should fail, the other half of the system still works. If one circuit fails, the brake pedal will go down much closer to the floor than usual and you will need to press it down much harder. And a much longer distance will be needed to stop the vehicle.
See also:
Airflow selection
Airflow selection ...
Precautions against vehicle modification
To avoid accidental activation of the system or rendering the system inoperative, which may result in serious injury, no modifications should be made to any components or wiring of the SRS airbag ...
The Subaru Safety Story
The Subaru Legacy, like all Subaru models, has consistently earned top scores
in government and insurance industry crash tests. The 2010 Legacy is designed to
further raise the safety quotient. Su ...