Electric Power Assist Steering System problems of the 2004 BMW 530

On April 16, 2006, while driving my 2004 BMW 645ci on a highway with only my 13-year-old son with me, the assisted steering, which works the rear wheels, failed without any warning or any event having occurred. I was able to bring it to a stop without a collision, fortunately, although the loss of control was terrifying and we came close twice to hitting other cars. The vehicle was ultimately flat-bedded to my dealers (greenwich BMW) service facility in port chester, NY. After two days of telling me that they had found no damage to the vehicle, the dealer advised that it would not honor the warranty because they found sign of impact to another, unrelated part on the underside of the car.