Toyota Camry
Toyota was always known as a manufacturer that paid attention to the quality of its products. When, in 2012, it made a deal with the US government to pay $1.2 billion to avoid criminal prosecution, the car community realized that even Toyota was covering something up. The thing that Toyota desperately wanted to hide was unintended acceleration on various Toyota and Lexus models due to a faulty part (via ABC News).
In fact, for several years, the company hid documents that showed that they knew about the problem but decided to do nothing about it. However, when the case was brought to light, Toyota paid all expenses, settled out of court, and recalled 9.3 million cars in one of the most prominent recall cases in history.