10. 2010 Toyota Corolla
Landing at No. 10 is the Toyota Corolla. This C-Segment stalwart has a strong track record for quality and dependability but it declined by 29 PP100 in the 2013 Vehicle Dependability Study. That gives the car an overall score of 122 problems per 100 vehicles, slightly better than the industry average of 126, which itself is a 5 percent improvement compared to last year. Still the decline is very strange for a model that’s been in production so long; it’s especially unusual for Toyota.