I have been giving this generic defect affecting D40's a great deal of thought lately (even though I own a D22).
There have been D21's, D21 facelifts and D22's where there have been NO reports of mass rotting chassis', the D40 is the fourth generation of what is basically the same chassis, even sharing the YD25DDTi engine in another guise, yet this model suffers very frequent examples of terminal chassis rusting, sadly this problem can only be expected to get worse as time passes, with more and more D40's being affected.
To my mind, something has gone very badly wrong with the manufacture of the D40 chassis, as this is the only model affected, yet it is also the newest!
Surely this fact is proof that the manufacturing process has been detrimentally changed, thereby building in a latent generic defect!
This manufacturing change is clearly the responsibility of the manufacturer, and has absolutely NOTHING to do with the subsequent ownership or usage of the vehicles?