The major structure of most cars are made of stamped and spot-welded sheet metal, usually steel. IIRC Teslas are made mostly of aluminum, so some of the parts might be extruded, cast, and/or machined, and they might also be riveted and/or bonded (glued) together. The body shell shouldn’t need to be very precise, maybe +/- .03" at most. On the other hand, the dies that make the body panels are under tremendous pressure and need to be more precise so that they can consistently turn out good parts without wearing down or breaking.
The major structure of most cars are made of stamped and spot-welded sheet metal, usually steel. IIRC Teslas are made mostly of aluminum, so some of the parts might be extruded, cast, and/or machined, and they might also be riveted and/or bonded (glued) together. The body shell shouldn’t need to be very precise, maybe +/- .03" at most. On the other hand, the dies that make the body panels are under tremendous pressure and need to be more precise so that they can consistently turn out good parts without wearing down or breaking.