One problem related to loud engine noise has been reported for the 2011 Hyundai Sonata Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Sonata Hybrid based on all problems reported for the 2011 Sonata Hybrid.
Vehicle was in motion on I-75. Began to make a loud noise. And started to stall. I pulled over tried to go again. Car wouldn't go over 30miles pulled over and called a tow truck. Dealership stated the engine went out.