I think my 2000 X has a build date of late 99. What years of upper and lower control arms are compatible? If you all recall my son had cracked the front cast wheel which I replaced. Turns out the front control arm either upper, lower or both are bent. For searching boneyards will any year of 00 to 04 fit properly?

As far as I know, yes.

And don't forget, Frontiers from '98 to '04 will fit as well. Just make sure you get the appropriate 4x4 or 4x2 arms for your rig.