"In nearly all of the 19 crashes of models with standard ESC, the rollovers were preceded by an impact. In other words, they were pushed over by another vehicle or they flipped after hitting an object. In contrast, 37 percent of the rollovers of vehicles without standard ESC weren't preceded by an impact, meaning in all likelihood they lost stability during a maneuver."

"There always have been rollovers caused by an initial impact, but since it is more difficult for ESC to address them, they will account for a larger proportion of the remaining rollovers as ESC becomes more common. Although they are more complex, rollovers of vehicles with ESC tend to be less severe. Only 9 percent of the crashes of models with standard ESC involved six or more quarter turns. In contrast, 41 percent of the rollovers of vehicles without standard ESC did."