The 2011 Hyundai Sonata represented a major redesign for the popular midsize sedan, featuring a six-speed automatic transmission paired with either a 2.4-liter four-cylinder or a turbocharged 2.0-liter engine. The transmission was generally smooth and refined under normal driving conditions. However, some owners reported issues such as hesitation during acceleration, rough downshifts,... https://turboautoparts.com/used-transmission/hyundai/sonata/2011