I had a 57 plate Navara that Nissan bought back. All Navaras from 2005 to 2015 in the UK were built in Spain and the chassis were not properly treated. This has resulted in the box sections rusting from the inside out so it’s difficult to spot the problems until the holes begin appearing.
Nissan were very fair with me but if mine had not failed an inspection I would have been left with a truck that would have been difficult to sell on as more people become aware of the problem.
If anyone has a Navara or Pathfinder I can recommend having a look at a facebook page called Nissan Navara Snapped Chassis group. You might have to trawl through a lot of stuff to fund it but there are useful bits of advice on there about how to deal with Nissan customer services.