Just looking to see how common this is in the KL cherokees. I'll preface this by saying I have a limited knowledge of the inner-workings of engines. Three weeks ago my 2016 v6 cherokee 98k miles, threw a check engine light, the code was P0306, misfire on cylinder 6. I brought it to a local shop and they figured it was spark plugs and replaced all of them and cleared the code. A week later the same light and code came back on so I figured my best bet would be taking it to a Jeep dealership. Long story short the tech called me back yesterday and said they were able to confirm I had a bad cylinder head, I don't remember 100% if he said it was cracked or just bad but I digress. Looking at a $3,000 bill to fix it, which I'm doing because I don't have much of a choice. I'm just curious if this is a common issue, and if there's anything I can do in the future to prevent this from happening again, or is it just **** luck.