VIN validator

Client

VIN validator searches want the same workflow as VIN check: normalize characters, enforce length, run mod-11 on position nine. This page names that intent for bookmarking and support macros.

What the validator enforces

Exactly 17 characters after cleanup. Letters I, O, and Q rejected everywhere. Position nine accepts 0–9 or X. Weighted products sum to remainder mod 11 matching the check symbol.

Privacy: parsing runs only in your browser. This page does not query DMV, insurance, or manufacturer databases—only the published mod-11 rule for the ninth character.
?

After removing spaces and hyphens, the frame must be exactly 17 characters. Letters I, O, and Q are forbidden everywhere. Position 9 (index 8) is the check symbol: decimal 0–9 or X for remainder ten. Each symbol maps to a numeric value, is multiplied by a fixed weight for its position, products are summed, and sum mod 11 must equal the check symbol’s value (X → 10).

Result

Passes check digit — weighted sum mod 11 is 10; expected X.

  • WMI (positions 1–3): 1HG
  • Attributes (4–8): BH41J
  • Check (9): X
  • Model year code (10): M
  • Plant (11): N
  • Sequential (12–17): 109186

Common use cases

  • Validate VIN columns before fleet or rental upload.
  • Explain validator pass/fail to non-automotive stakeholders.

Common mistakes to avoid

  • Using validator output as insurance eligibility proof

    Valid checksum ≠ assigned policy or lien status.

FAQ

What does a VIN validator check?

Length, allowed symbols, mod-11 check digit, and field split readout.

Is this an NHTSA database validator?

No—public ISO 3779 arithmetic only.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • vin check digit verifier online
  • validate vin number mod 11 free
  • ninth position vin checksum browser
  • iso 3779 vin check digit calculator
  • vehicle identification number check digit locally

More tools

Related utilities you can open in another tab—mostly client-side.