Brake Disc Rotor problems of the 1999 Toyota 4Runner

Experiencing severe vibration when braking at speeds over 50 mph. Steering wheel vibrates and control is difficult. Identified as warped rotor. Toyota dealer wants to charge to replace front caliper/rotor with larger design. Claims that its common to have it fail shortly after warrantee coverage. (failed at 50000, coverage to 36000) purchased vehicle with 17000 miles and rotors/pads look good.

Consumer complained about vehicle vibrating when applying the brakes. Consumer replaced the front pads and both front rotors. Within two weeks the problem recurred. Dealer was contacted.

While driving 45 mph had extended stopping and brakes vibrated when applied. Front brake rotors were warped and had to be replaced. Consumer feels this happened prematurely.

This is an intermittent problem that during braking at various speeds on varying roads surfaces and hills the front end of the vehicle shakes to the point it feels as if the driver may lose control. August 1999 took to auburn Toyota and they stated front rotors were extremely warped and were replaced. The problem continued first being noticed the next day. Again in November 1999 the vehicle was taken to service, this time they could find nothing wrong. Again this problem is intermittent--you could literally brake feel the vibration, let off, apply the brakes again and feel no vibration. Other times it may be a little more persistent. Most of the time the brake system seems to function normally, but at times the frontend vibrates something fierce. That also varies. Sometimes it is a slight vibration, and other times it vibrates up through the steering wheel quite severely. The simple answer from Toyota is it must be the rotors or we couldn't duplicate the problem. My concern is that we arrive at a more understandable explanation and hopefully a solution. Can abs create a vibration if the system is not pulsating like it should?.