[thumper]

this is a few years old. not sure if it's been posted before...

https://localmotors.com/

https://youtu.be/4rww0QiRavo

https://youtu.be/WwvwvjNjQaQ

[thumper]

here's another company Divergent - Green Automotive Manufacturing (http://www.divergent3d.com/)

https://youtu.be/MwC-eiIScMU

[Manic!]

The first one is not street legal and would do terrible in a car crash even at low speeds.

The second one is not 3d printed except for the connectors. 3D printing them is fine for the prototype but if you where going to mass produce them 3D printing would be way to slow. Better off using traditional methods of mass producing connectors out of metal.