Legally, however, the definition is a different story. It's generally either the 'cab' or the frame which legally is the vehicle, and this varies from state to state. The majority of states proclaim the cab, with it's attached VIN, as the legal entity of 'vehicle'.
Doesn't help, Dave. What if I kept welding patches onto my rusting cab (well, bad example for the D, but you get my point), and then replaced my damaged VIN plate with an exact replica? (I'm sure it is the number that matters, not the metal in the plate)
This conundrum is, of course, well-trodden ground. Philosophers refer to it as the riddle of the Ship of Theseus: Is it the same ship that returns to port after being away so long that each and every one of its planks, nails, sails, ropes, etc has been refitted? And what if a new ship is made out of those discarded parts? Surely they can't *both* be the same ship... And so it goes.
What is the identity of a wave on the ocean? It's component "parts" (the atoms of water) are constantly changing and are mostly irrelevant to the identity of the wave as such. It seems to be the continuity of *pattern* that matters, not the pieces. So, I guess that as long as your particular collection of scraps of stainless steel and plastic traces a continuous path back to Dunmurry, you're OK.
--Pete Lucas VIN #06703