2011 Porsche Panamera engine problems

Tl* the contact owns a 2011 porsche panamera. While driving approximately 50 MPH, the engine stalled without warning. The vehicle failed to restart and was towed to an authorized dealer. The technician stated that one of the engine bolts dislodged into the engine which caused severe damage. The engine was in the process of being replaced. The manufacturer was notified of the problem. The approximate failure mileage was 25,000.

I was driving approx. At 55 MPH, engine lost power, lost power steering, brakes felt like having no power and it was very difficult to brake. Electronic system seemed to have power, battery was not dead but engine was dead resulting in loss of power steering and break. A similar problem was also reported by another driver on july 12, 2012 on this model car (web search). Porsches has checked my car and they report that there is no error code and it meets their specification.