Toyota used to sit on top of the world. It basked in the reputation of building high-quality cars efficiently. It enjoyed unprecedented growth, even surpassing General Motors as the largest car manufacturer in the world. But all of that came tumbling down with reports that cars were accelerating out of control, careening down highways, and putting everyone’s lives in danger. There was even a recording of a 911 call from an off-duty policeman who lost control of his car and died in the ensuing crash. Toyota responded with a recall of historic proportions—nearly 8 million cars in the United States and 1.8 in Europe. It even suspended sales of brand new models, including the best-selling Camry and Corolla, until the vehicles could be repaired. But still, there was confusion about what was causing the problems—was it the floor mats, the braking system, the software controlling the engine, or something else? Conspiracy theorists argued that Toyota had no clue what was causing the sudden acceleration, and that their recall was basically worthless.