Many people were surprised when Consumer Reports listed the Hyundai Sonata as the most reliable car. CBS MarketWatch takes a closer look at how the company went from the butt of reliability jokes to laughing their asses off at Mitsubishi and Chevrolet. All this praise is based on the outgoing Sonata model that will be replaced this year. The new sedan is supposed to be a vast improvement over the last. Hyundai may be a darkhorse, stealing market share from the Big Three of Japan.