Some vehicles can survive car crashes and protect the occupants much better than others. To find out which motor vehicles perform best and which the worst, nonprofit group Insurance Institute for Highway Safety performed crash tests. IIHS, which is ?dedicated to reducing the frequency and consequences of crashes on U.S. roads,? rated the cars in four separate categories. 24/7 Wall St. examined the ratings and identified the seven current-generation models that received a ?marginal? or ?poor? rating in two of the four categories.