In the experience of owning my '14 since brand new you would be better off putting that $1,800 in a savings account or a stock portfolio (since interest rates are so low right now). I had to put new ball joints in my truck at 85,000 miles at the cost of ~$1,200 IIRC. I used my truck offroad a lot so you probably won't have to do this. I also had the turbo actuator replaced at 97,000 miles but that was covered by the powertrain warranty. Like others have mentioned it is a gamble. If you give FCA the $1,800 they are going to invest it so you might as well do it for yourself.