I have had kind of the same surprise told yesterday. I brough my 2004 Quest (113,000 km – first owner) to the shop for a replacement of the left “suspension arm” which apparently needed replacing.
The frame unit is what holds the engine and the direction together. I took a picture and you can see that on the right side (passenger) the frame unit is rotten through and through. It can be repaired, at a cost of 750$ for a used frame unit plus 5 hours of work plus all the extras… Total cost, 1800$ with taxes if they have to change the left suspension arm…
I’m going to call Nissan Canada but I’m not expecting much either….