What warns you that part or all of the brake system isnt working properly?
whatever you hit cause you can't stop
Whether the car is stopping or not will warn you every time. Also if you here squealing, smell burning, or the brake is spongy can all be a sign of a problem.
the brake light on the dash measures fluid level if it is on you have a leak. otherwise noise is the next warning.spongy pedal means there is air in the system.
