One problem related to brake grinding 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.
I was driving on the freeway at approx. 60 mph and the parking brake suddenly engaged. The dash alarm went off and the car starting making terrible grinding noises and swerving lane to lane. I was able to fight it and make it to the right shoulder. After turning the car off and on again it disengaged and I was able to drive it for a short distance before it happened again. I had it towed to my house and will take it to the dealer on Monday.