Wow man that sucks but if the powertrain warranty is transferable, how can they expect you to have the service records? I just have the feeling there is some form to fill out with Mitsu that maybe the used car dealership didn't take care of when buying the car, or maybe the warranty was actually void due to missing service records before you bought it. Not to defend the stealership or anything, they obviously are assholes, just thinking the whole process through.

If you end up with a Mitsu bill, make sure you get them to mark down 100,500 KM!