Oh not they don't. They can do to you what they are doing to us - fiddle fart around until you either give up, or make the diagnosis yourself. Nissan do not want to know you if the repair under warranty is going to cost them. And our Patrol isn't modified in any way. Check out the "Overheating 2010 GU Patrol" thread in this forum. Be very, VERY wary of a wounded Patrol, especially if Nissan Australia think they can blame a prospective warranty claim on a modification done by a non-Nissan dealer.