Brake Disc Caliper problems of the 2008 Infiniti G35

The contact owns a 2008 Infiniti G35. The contact stated that while driving 75 mph, the rear brakes ceased. There was an abnormal scraping noise detected. There were no warning lights illuminated. The vehicle was taken several times to an independent mechanic where the contact was informed that the rotors and calipers needed to be replaced. The local dealer was not contacted. The vehicle was not diagnosed nor repaired. The manufacturer was contacted however, no further assistance was provided. The failure mileage was 30,000. The VIN was not available.