Brand new 2021 3039R tractor/loader. I put 40 hours on it and it threw intake manifold pressure code. Had dealer pick it up and check out. It was returned to me with new fuel sending unit and installed "parts missing from factory". After I looked up part numbers on invoice I found out suction line from air box to turbo was missing. So my 40 hours on tractor was used for moving 100 tons of dirt and tilling 1 acre field. I had to fight with JD and dealer to pick back up and borescope engine. 2 out of 3 cylinders were fine. The third one closest to turbo had half the cross hatching was missing and cylinder had vertical lines in it. After more fighting with JD, since it was their fault parts were missing from factory, they agreed to install new engine and turbo. Should I have tried to get new tractor or just let them put new engine in? Only 40 hours on tractor. It has been a real fight to get JD to do anything about their mistake. Anybody have any suggestions?