An uglier way without any extension function dependencies might look something like this:
```sql
sqlite> CREATE TABLE Vehicle(
...> Vin TEXT NOT NULL PRIMARY KEY,
...> Odometer INTEGER NOT NULL,
...> CHECK (Vin GLOB Replace(Hex(ZeroBlob(Length(Vin))), '00', '[A-Z0-9]'))
...> );
sqlite> INSERT INTO Vehicle VALUES ('ABC123', 0);
sqlite> INSERT INTO Vehicle VALUES ('ABCx123', 0);
Error: CHECK constraint failed: Vin GLOB Replace(Hex(ZeroBlob(Length(Vin))), '00', '[A-Z0-9]')
```