They were from my understanding based somewhat on the CRV. The frame stiffener is wear the trailing arms mount. Part of the failure would be related to salt use on roads.
Quite scary. On one plus side the Element bI have does not have the stability control; just the Abs otherwise might have been more difficult to control it.
The roads here are quite windy; so a very high probability I could have been on a curve section of road vs a straight section.
Did the Bmw also have trailing arms? Or different but similar failure condition?