Is the year of the coach based on the year of the chassis

This will continue to be a PITA for most self-propelled RVs. Because EPA, DOT and MVSS regulations are all tied to the model year of the chassis, RV upfitters can no longer identify the unit by their own model year. Years back, the final upfitter would assign a VIN of their choosing, but as soon as the powers that be forced the 17 character VINs as a primary certification, that all had to change.

Matt