TL* THE CONTACT OWNS A 2008 INFINITI QX56. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 10 MPH AND DEPRESSING THE BRAKE PEDAL, SHE NOTICED A VIBRATION IN THE PEDAL AND THE VEHICLE WOULD NOT STOP. THE BRAKE LIGHT, VDC AND THE ABS WARNING LIGHTS ILLUMINATED ON THE INSTRUMENT PANEL. THE FAILURE RECURRED SIX TIMES WHILE THE CONTACT WAS TRAVELING AT DIFFERENT SPEEDS. THE VEHICLE WAS TAKEN TO THE DEALER SIX DIFFERENT TIMES. THE TECHNICIAN STATED THE BRAKE BOOSTER AND THE MASTER VAC ASSEMBLY WOULD HAVE TO BE REPLACED. THE VEHICLE WAS REPAIRED HOWEVER, THE FAILURE RECURRED AND RESULTED IN THE CONTACT BEING INVOLVED IN A CRASH. THE VEHICLE WAS NOT FURTHER REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 48,670.