Not sure if this is really "the first one ever", but regardless, it is interesting:
http://www.kshb.com/news/science-tech/kc-man-is-1st-in-us-to-3-d-print-a-moving-vehicle
http://www.kshb.com/news/science-tech/kc-man-is-1st-in-us-to-3-d-print-a-moving-vehicle