It's also wrong/limited to US-manufactured cars. The 2nd and 3rd letter outside of the North America doesn't follow the convention of country, and manufacturer.

It's also wrong/limited to US-manufactured cars. The 2nd and 3rd letter outside of the North America doesn't follow the convention of country, and manufacturer. For example Alfa Romeo has Z, followed by AR; Fiat has ZFA. German-made BMWs (as opposed to US-made ones) have WB...