Seems to be a Nissan problem. This is my Patrol at 12 years old. You could push a hole in the chassis rails, it was that rotten behind the rear axle.

. And that was 10 months after an MOT with no findings!! He didn’t look very hard. New second hand chassis it was.
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That was 11 years ago. Now I am replacing the piston rings as the compression was half of what it should be.
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Also giving the head a good as an EGR valve doesn’t mix with oil being sent back from the breather to the inlet manifold. EGR valve is now blocked off and an oil catch can installed.
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