World Manufacturer Identifier (WMI) tables change slowly, but they do change: new assignments, manufacturer string updates, and corrections. If you ship a free VIN product, you probably keep a local WMI map so you can sanity-check the first three characters without calling NHTSA on every keystro...
Source: [Dev.to](https://dev.to/vin_lookup_8dbd4710f77e9e/using-etagif-none-match-style-patterns-for-local-wmi-cache-freshness-5hak)