The factory doesn't offer the option. If any dealer installed one it would be aftermarket. I do business with car audio shops for alarms and remote starting. Search the forum a little better and you will find a long thread on alarms and remote starting the 2011 Sonata. There are units out there that work well. The Smart key and push button start complicate things a bit. It is far less complicated for GLS models.2011 Sonata GLS
Anyone have a remote start added by the dealer? How much did it cost? Is it an aftermarket or "factory" unit? Does it work well?