Air Brake Disc Rotor problems of the 2005 Nissan Titan

I purchased my Nissan Titan in Jan of 2006, and since then have been plagued by repairs and maintenance. The most recent and most annoying has been the front brakes. Over the course of a few weeks, my truck would start to shudder violently when I applied the brakes. Upon having the problem serviced I was told that the front rotors were warped to the point of failure. The entire front brake system was replaced at no cost to me.

Mostly highway driving since new. Current milage 4,700 miles. At about 4000 miles extreme shudder and vibration in steering and brake pedal when brakes applied at speeds above 20 miles per hour. Suspect front brake rotors are warped.

I purchased a 2005 Titan 4 door 2 months ago. At approx. 3000 miles it began to shake violently when the brakes are applied at any speed. I called the dealership, who affirmed that this was a known defect prior to my purchase, and that I could bring it in for a temporary fix. They exclamed that this was not a safety issue. I strongly disagree with their claim, and am very disappointed by their lack of responsibility concerning this matter.