Translation of the highlighted statement by Isuzu-
OK, so the frames are rusting. The owners should be aware of the rusting of their vehicles and know that something is about to break under there. So it shouldn't be a safety issue and we're not responsible. Let 'em get it fixed at their own expense and the problem is solved.
I guess there's an engineering analysis in the works. I can imagine the BS that'll come outta that study.
Mark