I have had a slight ticking since it was brand new, build date 10/27/11. My CEL just went on at 10,700 and I got a P0304 code which is a cylinder # 4 misfire. I have a call into the dealer for service. I called Chrysler Customer care in regards to getting a loaner car, and have been assured I can have one if the repairs take more than a day. I am just waiting to see if my dealer has the parts in stock. I saw someone post that they had their head replacement done in 4 hours, I hope I am that lucky!