Ok I am in need of some help with my nav. system. I have a 2004 titan and took a weekend trip where its was really hot. now my unit reads disk error, I made all the call that i needed to. and was told that i might have to replace the dvd drive, My truck has no warranty. So iam asking for some help. has anyone had this problem? how did you fix it? and what the cheapest way to fix it? Or should i go back to dodge trucks. Please Help i like my titan