Also the "Parts Manual (EPC)" [0] is interesting since it contains the part numbers of a couple of models (maybe all, I don't know what models they offer) and is very well organized. I'm not sure I'd find this for my VW.
What's missing from https://parts.vw.com/ ? The Tesla UI is a little better, I guess. It's also not particularly difficult to find the VW parts catalog software, EKTA.
There's an industry-standard set of interchange formats for spare part number listings called PIES and ACES. Unfortunately no vendor I'm aware of openly shares the underlying PIES/ACES data.
I never really figured out why there's not a corresponding non-US market official site, it might be a regulation thing indeed.
https://volkswagen.7zap.com/en/rdw/ has what I think is a scraped version of EKTA (it's supplied by https://levam.net ) and is absolutely infested with horrible ads, but has pretty complete catalogs for ROW cars.
To save others the bother of finding the relevant link: https://epc.tesla.com/en-US/catalogs/301 is the Tesla Roadster but if one drills into (e.g.) "10.15 - Door Shells and Beams
- Door Shells and Beams - 1" <https://epc.tesla.com/en-US/catalogs/301/categories/22077/su...> then it does seem to enumerate the parts but does not provide any details other than an internal part number and conceptually the assembly order of them
Also the "Parts Manual (EPC)" [0] is interesting since it contains the part numbers of a couple of models (maybe all, I don't know what models they offer) and is very well organized. I'm not sure I'd find this for my VW.
[0] https://epc.tesla.com/#/catalogs