Printing car parts?

[curious aardvark]

polycarbonate is fairly cheap to buy - in comparison to peek anyway.
But it is an absolute nightmare to print with. Even with an enclosed print volume, it either doesn't stick to anything or it sticks to the point it won't let go.

The other thing to bear in mind is that you will generally need to design the parts from scratch, yourself.
You might find some models already existing on the interweb - thingiverse is pretty good for car parts.
https://www.thingiverse.com/search/p...0592ff70aee457

But most likely you'll need to get a digital caliper and do it yourself.

So factor in the time taken to reverse engineer the part and then print it and the materials against going down a scrapyard and getting a used one.