The running "joke" is that insurers pay to put your original stuff back into car, as insurers somehow find "used" parts for mechanics.
Edit: Especially airbags, they require special certifications to be installed and managed in Sweden, second hand airbags is NOT a thing here. Though other parts very well might be.
There isn't any greater authority, keeping track of every car part or ensuring the number of wingmirrors leaving stock matches the number legitimately entering stock.
I'm not saying it can't happen every now and then, but it wouldn't work systematically.
It’s not inequality when instead of a cheap hatchback you NEED to buy BMW 5-Series or Porsche Macan. But you import a damaged one from US. And then you need a bunch of „used“ parts to repair it.
Unfortunately it’s hard to check every boot for stolen headlights and steering wheels without border control
"Involving checks at border crossing points and in-land activities in 16 EU countries and five countries in the Balkan region"
Just as Apple can’t prevent abusive people from having the desire to track, stalk, and creep on their own family members, I don’t think you have a practical outlook or plan here.
The manufacturers do what they can, and they deserve all our respect for that, not derision.