VIN check without Carfax

Client

Before paying for vehicle history services, confirm the VIN string itself is valid. This page runs free mod-11 math locally—accident and title history still require separate paid reports.

Free math vs paid history

Mod-11 validation costs nothing and runs locally. Vehicle history aggregates accidents, registrations, and auctions from data vendors—order those after the VIN string validates.

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.
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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

  • Reject listing typos before buying history reports.
  • Train staff that history vendors need a valid 17-character frame first.
  • Bookmark a free step ahead of paid Carfax-style workflows.

Common mistakes to avoid

  • Assuming without-Carfax means free full history

    Only checksum and format—history data is a different product category.

  • Ordering reports on failing checksum strings

    Fix the VIN typo first—history vendors may return empty on bad input.

FAQ

Is this a Carfax alternative?

No—it is a free format step history reports assume you already passed.

Why check before Carfax?

A single wrong digit wastes report fees and support time.

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

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