I bought the car new and since then, on four separate occasions with the engine running and the brake depressed, the engine begins to race at a high speed and on two of those conditions, the car lurched forward and I struck the vehicle in front of me. On the other two occasions, the car did not move forward but the engine was racing. BMW did their inspection on the vehicle and found nothing out of the ordinary but said when this happens again to place the car in neutral and turn off the engine, I'm concerned that when this happens again, I may be at a crosswalk and actually strike a pedestrian causing personal injury or worse. I honestly now feel uncomfortable driving the car as I deem it a safety issue and request assistance.