| build_nhtsa_url | Build a NHTSA URL |
| build_vin_batch_url | Build a NHTSA URL |
| build_vin_url | Build a NHTSA URL |
| check_vin | Verify VIN Validity |
| check_vin_no_purrr | Verify VIN Validity Without Purrr |
| check_vin_purrr | Verify VIN Validity Using Purrr |
| decode_vin | Use the NHTSA API to Decode VINs |
| swap_letter | Replace a Letter in a Character Vector |
| swap_map | Replace Multiple Letters in a Character Vector |
| valid_check_digit | Check for Valid VIN Check Digit |
| valid_vin_format | Check VIN Length and Characters |