Key facts
- 17 characters, no I/O/Q. Every US on-road vehicle built for model year 1981 onward has a fixed 17-character VIN under 49 CFR Part 565. The letters I, O and Q are never used, to avoid confusion with 1 and 0.
- Four sections. Positions 1-3 are the World Manufacturer Identifier (country + make/type); positions 4-8 describe the vehicle; position 9 is the check digit; positions 10-17 are the model year, plant and serial number.
- Position 10 is the model year. 2026 = T, 2025 = S, 2027 = V. The code repeats every 30 years; a letter in position 7 marks the 2010-2039 cycle, a digit the 1980-2009 cycle.
- Position 9 is a check digit calculated by weighted arithmetic (mod 11), written 0-9 or X. It catches most typos and clumsy VIN clones, but it is a checksum, not a database check.
- Most common physical spots: lower driver-side windshield and driver's door jamb; also under the hood and, on some trucks, the frame rail. Placement is standard, not universal.
- The documents must match the metal: title, registration and insurance card should all show the same VIN as the car.
- The payoff is running it: the decoded number is the input; a recall and history check is what tells you whether the car is safe and honestly represented.
Where is the VIN number on my car?
The VIN appears in several standard locations, and the two easiest to reach are the lower driver-side corner of the windshield (visible from outside the car, looking in through the glass) and a sticker or metal plate in the driver's door jamb or door post (visible when the door is open). These are the spots dealers and police use, and they are present on the large majority of modern cars. Placement is standard, not universal, so if one spot is missing or damaged, check another.
Beyond those two, the VIN is often stamped or plated under the hood on the firewall or an inner fender, and on some older or specific vehicles it is stamped into the engine block or frame. On many trucks and SUVs a secondary VIN sits on the front frame rail. Less common secondary spots include the trunk or spare-tire well, under carpeting, and a liftgate sticker.
| Location | Notes |
|---|---|
| Lower driver-side windshield / dashboard corner | Readable from outside; most common |
| Driver-side door jamb / door-post sticker or plate | Visible with the door open |
| Under the hood (firewall or plate); engine block on some cars | Older or specific vehicles are stamped |
| Front frame rail (trucks/SUVs) | Common secondary location |
| Vehicle title | Should match the car |
| State registration | Should match the car |
| Insurance card / ID card | Should match the car |
| Trunk/spare-tire well, under carpet, liftgate sticker | Less common secondary spots |
Do the VIN on the dashboard, door jamb, title and insurance card all have to match?
Yes. On a legitimate car, the VIN on the windshield, the door jamb, the vehicle title, the state registration and the insurance card are all identical. A mismatch between any of them, a plate that looks replaced or re-riveted, or a door sticker with the wrong font or a peeling edge are classic signs of a cloned or re-tagged vehicle. Cross-checking every visible VIN against the documents is the first, free step — it is exactly how to check if a used car has a cloned VIN before money changes hands.
What does each digit in a VIN mean?
A 17-character VIN is divided into four sections defined by 49 CFR § 565.15. Positions 1-3 are the World Manufacturer Identifier (WMI): character 1 is the country or region of manufacture, and characters 2-3 identify the manufacturer and vehicle type or division. Positions 4-8 are the Vehicle Descriptor Section (VDS), encoding attributes such as body style, engine and restraint system (the exact meaning of each of these positions varies by manufacturer). Position 9 is the check digit. Positions 10-17 are the Vehicle Identifier Section (VIS): position 10 is the model year, position 11 is the plant of manufacture, and positions 12-17 are the sequential production or serial number.
| Position(s) | Section | What it encodes | Check-digit weight |
|---|---|---|---|
| 1 | WMI | Country/region of manufacture | 8 |
| 2 | WMI | Manufacturer | 7 |
| 3 | WMI | Vehicle type / division | 6 |
| 4 | VDS | Attribute (body / model line) | 5 |
| 5 | VDS | Attribute (engine / series) | 4 |
| 6 | VDS | Attribute (body style) | 3 |
| 7 | VDS | Attribute (restraint / trim) | 2 |
| 8 | VDS | Attribute (engine code) | 10 |
| 9 | Check digit | Calculated verification digit (0-9 or X) | — (0) |
| 10 | VIS | Model year (2026 = T) | 9 |
| 11 | VIS | Plant of manufacture | 8 |
| 12-17 | VIS | Sequential production / serial number | 7, 6, 5, 4, 3, 2 |
The single most useful character for a buyer is position 1 (where the car was built) paired with positions 2-3 (the make), and position 10 (the model year). You can confirm any decode for free against NHTSA's official vPIC VIN decoder.
Why are there no I, O or Q in a VIN?
The letters I, O and Q never appear anywhere in a US VIN because they are too easily confused with the numerals 1 and 0. This is confirmed by the § 565.15 letter-value table, which assigns values to every letter except I, O and Q. A common competitor error is to claim the VIN also excludes U everywhere — it does not. The letter U is a valid VIN character (its check-digit value is 4) and is only excluded from position 10, the model-year code, along with Z and the digit 0.
Which digit tells me the model year, and what letter is a 2026?
Position 10 encodes the model year, and for the 2026 model year that character is T. The model-year code runs on a 30-value cycle: letters A-Y skipping I, O, Q, U and Z (21 letters), then digits 1-9. Because the cycle repeats, T also meant 1996 — so you disambiguate by position 7: a letter there means the 2010-2039 cycle, a digit means the 1980-2009 cycle. Note that the model year is not the same as the build date; a 2026 model can roll off the line in the fall of 2025.
| Code | Model year | Code | Model year |
|---|---|---|---|
| L | 2020 | S | 2025 |
| M | 2021 | T | 2026 |
| N | 2022 | V | 2027 |
| P | 2023 | W | 2028 |
| R | 2024 | X | 2029 |
What is the check digit, and how does it catch a fake or mistyped VIN?
Position 9 is a calculated check digit that verifies the other 16 characters. The method, quoted from § 565.15: assign each character its value (digits keep their value; letters use a fixed table, e.g. A=1, B=2, … with the omitted I, O, Q), multiply by that position's weight (8, 7, 6, 5, 4, 3, 2, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2 across positions 1-17), sum the products, and divide by 11. The remainder is the check digit; a remainder of 10 is written as the letter X. Change any single character and the arithmetic almost always fails, which is how the check digit catches typos and clumsy clone attempts. Its honest limit: it is a math checksum, not an anti-fraud database lookup, so a determined cloner can construct a VIN that is internally valid but still fake. That is precisely why running the number matters more than trusting that it "looks right."
What a VIN check can and can't tell you here
Decoding the 17 characters identifies the car; the payoff is running that VIN. The free authoritative check comes first: NHTSA's recall tool at nhtsa.gov/recalls shows manufacturer safety recalls not yet completed on that specific VIN, NICB VINCheck flags reported theft and insurer total-loss, and NMVTIS (vehiclehistory.gov) is the authoritative record of the legal title brand. A paid history report adds the layers those free tools do not combine — but no report does everything, so keep the split honest, especially the difference between what "recall closed" vs. an open investigation means on a VIN check.
| What you want to confirm | Best source |
|---|---|
| Which recalls exist on this VIN (presence/count) | NHTSA free tool, or any VIN history report |
| Whether a recall was actually remedied/flashed | The dealer or brand (proof of repair) — no report confirms this |
| An open NHTSA investigation (PE/EA) | NHTSA — a VIN report does not track investigations |
| The legal title brand (salvage/rebuilt/junk) | NMVTIS / the state DMV — the brand authority |
| Accident, airbag-deployment, odometer, theft, salvage-auction, ownership and listing history | A paid VIN history report |
A Zilocar VIN report, by VIN, can surface recall presence and count (the same data as NHTSA's free tool — which recalls exist, not whether any was fixed), accident and airbag-deployment records, an odometer/rollback check, theft records (NICB), junk and salvage auction records, ownership history, sales-listing history (asking prices, mileage, days-on-market), specs, NHTSA and IIHS safety ratings, and a valuation. It cannot show whether a recall was remedied, flag open NHTSA investigations, give per-unit firmware detail, or issue the legal title brand itself, and it does not show warranty status. Route remedy, investigation and title-brand confirmation to NHTSA, the dealer and NMVTIS/the state DMV.
What to verify by VIN before you pay
- Match every VIN. Windshield, door jamb, title, registration and insurance card should all read the same 17 characters. Any mismatch stops the deal.
- Confirm the check digit and decode. Run the VIN through NHTSA's free vPIC decoder; confirm the make, country and model year (position 10) match the car in front of you.
- Screen recalls for free. Enter the VIN at nhtsa.gov/recalls for open safety recalls, and ask the seller for proof any past recall was actually repaired.
- Check theft and title. Use NICB VINCheck for reported theft/total-loss and NMVTIS/vehiclehistory.gov for the legal title brand.
- Pull the history. Accident and airbag-deployment records, an odometer/rollback check, salvage-auction records, ownership and sales-listing history — the layers that reveal whether the price and condition are honest.
- Compare the asking price to the listing history. A car re-listed repeatedly, or priced above its own listing record, is worth a closer look.
How competitors and prices compare
Prices below name the provider and plan and are current as of 2026-09-28. Carfax, AutoCheck and Bumper checkout pages are JS-rendered and bot-gated, so their figures are reported by aggregators, not verified at the provider's own checkout; NMVTIS is sold for a small government-set fee through DOJ-approved providers. Zilocar's prices are fixed and owner-confirmed. For a full breakdown, see how much a Carfax report costs and the roundup of Carfax alternatives compared.
| Provider | Single report (as of 2026-09-28) | Multi / subscription |
|---|---|---|
| AutoCheck (Experian) | reported $29.99 (one source $24.99) | reported ~$49.99 / 25 reports in 21 days |
| Bumper | none (subscription only) | reported $19.99/30-day, $12.99/period on a 3-period plan ($38.97); $1 7-day trial |
| Zilocar (fixed) | $39.50 | $29.50 first month, then $59.75/month for 20 reports |
| Carfax | reported $44.99 | reported $79.99 / 3, $99.99 / 5, $39.99/mo |
| NMVTIS (vehiclehistory.gov) | small fee via DOJ-approved provider | authoritative title-brand / salvage / odometer record |
Who should use which
For a single car, start with the free authoritative stack: NHTSA (recalls), NICB (theft) and NMVTIS (title brand). To combine accident, odometer, salvage-auction and listing history into one report, a paid report is the practical route — on price alone, AutoCheck's single report is reported the lowest of the paid options; Zilocar adds listing and ownership history under Carfax's reported single-report price; and Bumper suits shoppers checking many cars on a subscription. No paid report is the authority on the legal title brand or on whether a recall was fixed.
If you would rather pull that history in one place than assemble the free lookups yourself, a Zilocar VIN report costs $39.50 for a single report, or $29.50 the first month and then $59.75/month for 20 reports (Zilocar pricing as of 2026-09-28). It screens recall presence and surfaces accident, airbag-deployment, odometer, salvage-auction, theft, ownership and sales-listing history — but it is not the authority on whether a recall was remedied or on the legal title brand, which stay with NHTSA, the dealer and NMVTIS.
