>>28526401 (OP)https://www.youtube.com/watch?v=Eqc5po7k2Uc
Today.
The problem with 3D printing being used for car parts isn't the technology, it's that 3D printing requires engineering. You can't just scan part-print part and will never be able to (not like most people are running around with , you have to reverse engineer it and then take material properties and printing specifics into account when designing a printable version. Sometimes it's as easy as "make it extra thick", but cars have many places that are dimensionally constrained. There aren't many actual engineers with free time running around, much less ones that are willing to share their efforts for free.
Another problem is that there isn't really a good repository to share these parts. There's like a dozen 3D printing sites and they all suck for the task at hand, particularly for categorizing parts. If there was an automotive-specific site with a Rockauto-like catalog, something might've taken off, but so far most people either keep what they design to themselves or dump it onto Thingiverse where it gets lost among the sea of articulated dragons and DnD dice with mildly different fonts.