Info from a website talking about the ibooser:
: What happens if I loose electricity? Do my brakes fail?
A: No! The pedal is connected to the master cylinder via a pushrod, exactly the same as vacuum boosted car. Should the electrical circuit be interrupted you would simply have manual brakes, precisely the same as if a vacuum booster failed. If you think about it, if you lose electrical power you've likely lost power to everything, the engine dies and with it power steering and all accessories. Vacuum or electric you'll still have manual brakes though.
: What happens if I loose electricity? Do my brakes fail?
A: No! The pedal is connected to the master cylinder via a pushrod, exactly the same as vacuum boosted car. Should the electrical circuit be interrupted you would simply have manual brakes, precisely the same as if a vacuum booster failed. If you think about it, if you lose electrical power you've likely lost power to everything, the engine dies and with it power steering and all accessories. Vacuum or electric you'll still have manual brakes though.
