One problem related to coolant leaking has been reported for the 2011 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Sonata based on all problems reported for the 2011 Sonata.
(pm dealer info) tl the contact owns a 2011 Hyundai Sonata. The contact stated that the vehicle overheated without warning. The vehicle was taken to a dealer where it was diagnosed that the engine head was cracked and caused coolant to leak. The manufacturer was not made aware of the failure. The vehicle was not repaired. The VIN was not available. The failure mileage was 90,000.