sub frame ripped off from the body/frame

Car was making unhealthy noises coming from the rear, mostly underneath for several months. The noise progressively gotten worst so I took it to a shop and the mechanic found the sub-frame ripped off from the main frame of the car. The mechanic advised that the car is very unsafe to operate and that if continued to operate it may cause a serious accident and could be deadly. Researched shows that there are the same problems with these models which makes me and the mechanic believe that it's a manufacturer's defect. Car manufacturer (BMW) should make things right and recall these vehicles before serious injuries and/or death occurs (if not already caused as such).