Yes, but it's NOT the -only- part of the tractor. The commenter who brought up this tractor example made it seem like the government outlawed people from tinkering or repairing ANY part of the tractor.
I also wouldn't be surprised if (much like cars), tractors generally only need mechanical repairs over the duration of their lifespans.
I also wouldn't be surprised if (much like cars), tractors generally only need mechanical repairs over the duration of their lifespans.