Brakes Randomly Go Out

[Silas]

has anyone ever had a problem with there brakes for a sc400. i was driving and then when i went to press on my brakes they where hard as hell to push. I have to slam on them for them to barely work. Has anyone ever had this problem?

[SKperformance]

your brake booster is not working,either you hose for vaume attached to the engine is broken/cracked or fallen off

otherwise the booster is toast as i doubt all your calipers are frozen ,one at a time maybe but that would cause the car to pull hard to one side when braking but you didn;t mention anything else.