This has come up before, and "officially" the Year Model is that Year Model assigned by the Coach Builder, not the Chassis Builder.
That's even though the finished COACH bears the same VIN as the CHASSIS. If you cast a gOOgle net about, there's a group who will help get that corrected. I don't know if it was FMCA, Good Sam, the more I think about it, more likely it was Escapees.
Snafu probably happened at some state DMV. Our coach is currently mis-registered. It IS a 2003 Jayco but it's registered as 2002 Ford. At its age, I really don't think it matters, and I can still show it's 2003. For Model Years in the 2011+ range, I can see why you'd want to try and fix it.
