Hyundai Sonata TSBs
The Sonata has been assigned 606 technical service bulletins (TSB). The 2011 model year has been involved in the most bulletins.
TSBs contain recommended steps and procedures for diagnosing or repairing a known problem. They are issued directly by Hyundai to service technicians. You'll often see TSBs used as evidence in lawsuits when owners feel the automaker should help with repairs.