Other information:
Your vehicle has power-assisted brakes that adjust automatically through normal
usage.
In the event that the power-assisted brakes lose power because of a stalled engine
or some other reason, you can still stop your vehicle by applying greater force
to the brake pedal than you normally would. ...
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Recover the refrigerant with a recovery/recycling/charging station.
3.
When the engine is cool, drain the engine coolant from the radiator ...