There are two part numbers to choose from -- for the record, your local parts guy isn't being lazy...our computer system doesn't give us particular info on parts...only part numbers, and the VIN# will tell us exactly which one you would need. In your case, I'm assuming you want to use this on your Frontier as there was another member here that did it with positive results. Our system doesn't specify if a part will work in other applications. Also, more than likely, your local dealer won't carry this product in stock so it's not like he can just go to the back and look. Dealers usually stock more common items, our local warehouses carry all the other stuff. Our typical lead time to get a part is exactly 2 days if local...up to a week if its in another state:
VQ35DE Motor 02-05 -- 21200-4w01b -- My price $17.74
VQ35HR Motor 06-08 -- 21200-jk20a -- My price $17.74
Let me know if there is any way I can help!
Scott VanderHeide
Fontana Nissan
800-989-6173 x2253