My front driver side door lock and the rear gate door locks are not working. The troubling aspect is that they randomly work, and the rear passenger side also randomly does not work. I asked the dealer about this, to see if there is an ECU that controls the locks and he could not answer my question. He then told me that the latches would need to be replaced at around $150 a pop. Anyone have this problem? How difficult is it to replace the latches, if that is really what needs to be done. It seems to me that on something electrical like this there should be an ECU that I can replace first, before pulling the door skins. Any suggestuions?