Brake Squeaking Noise problems of the 2006 Infiniti G35

The contact owns a 2006 inifinti G35 coupe. When he applies pressure on the brake pedal, he hears a squeaking noise. Sometimes when braking he feels grinding. The dealer was contacted, but they could not identify the cause of the failure. He been in contact with infinite consumer affairs, but no assistance was provided. He was also advised that the failure was a normal characteristic of the vehicle. The vehicle has been traded in for a 2009 Infiniti. The failure mileage was 25. The current mileage was 52000.