>>28533869
different polyurethane
you can make some components in the car out of tpu, they are fantastic materials, but printable tpu tends to soften at 50-70 degrees, which is achievable from just friction of deformation if you drive hard, and more than achieveable anywhere near the engine bay
there are guys who sell printed tpu bump stops, for example, but bump stops are "fuck, we went too far" components that only see occasional usage, and not ones under constant load
if you wanna make bushings with a 3d printer, make molds with the printer and then cast bushings in them, it'll be cheaper too