general problems of the 2007 BMW 328

I had just purchased a brand new BMW 328i. We were driving on I-5 from los angeles to san francisco. I was accompanied by my husband and two dogs. We were traveling ~80 miles per hour in the left lane. All of the sudden and without warning, the engine turned completely off on the vehicle. I lost power steering and breaking and had no other option than to glide into the center median. Unfortunately, there was not sufficient room for the vehicle, so the right tires were in the left lane of traffic. We called BMW assist, but they said they would not pick us up because we had dogs in the car. We were stuck in the median for nearly one hour, around a bend in the freeway, where other cars could not see us well until the last minute. A California state trooper together with a tow truck finally rescued us from the center median. He said we were in grave danger, which we obviously knew. After the incident I called the beverly hills BMW dealership, where we purchased the vehicle, and spoke with the manager and reported the issue to BMW assist. I was furious that a vehicle would turn off at that speed. They told me they would document the claim but that no other incidences of this had been reported. The latter is inaccurate, as many people apparently have had the exact same issue.