going back 7 years is just old wives tales.
it depends on what manufacturer it is and what parts you need.
as 1971d21 stated 426 parts wern't available after a couple of years.
on my 08 bullitt mustang ford discontinued the special turned dash parts in early 2010 and they made 09 bullits.
i work at a VW dealer. we just ordered and got parts for a 90's jetta. then we tried ordering odd dash parts for a 2011 and they were not available.
in my opinion. if the parts sell reasonably well they are made for a LONG time. as soon as orders taper off they don't get made again, the newer the car the worse it gets. it doesn't matter what manufacturer it is.
