Infiniti VIN Check
Every Infiniti vehicle manufactured for the North American market since 1981 carries a standardized 17-character Vehicle Identification Number (VIN) regulated by NHTSA under FMVSS 565 and ISO 3779. This code is unique to each vehicle and encodes the country of assembly, manufacturer identity, model attributes, engine configuration, model year, assembly plant, and production sequence number. Decoding a Infiniti VIN helps you verify a used-vehicle listing, confirm the correct parts and service history, check for open recalls, and detect potential title fraud.
Infiniti uses manufacturer-specific encoding in the Vehicle Descriptor Section (positions 4–8). Position 4 typically identifies the model line — for example, popular Infiniti models include Q50, QX50, QX55, QX60, QX80. Position 8 usually encodes the engine type. Position 9 is a mathematical check digit that detects typos and many forms of VIN tampering. Position 10 encodes the model year, and position 11 identifies the assembly plant. Infiniti uses JNK and JN3 WMIs for Japan-built models; some U.S.-market Infiniti models share Nissan U.S. WMIs.
Infiniti launched in 1989 as Nissan's luxury division, debuting with the Q45 sedan. The brand competes with Lexus and Acura in the premium segment with emphasis on performance-oriented sedans and crossovers.
How to Read a Infiniti VIN
To read a Infiniti VIN manually, start with the WMI (positions 1–3) to confirm the manufacturer and country of origin. For Infiniti, the WMI prefixes in our database include JNK, JN3 and others depending on where the vehicle was built.
Position 4 encodes the Vehicle Line. Common values include A=Maxima, B=Altima, C=Versa / Sentra, D=370Z / Z, E=Leaf (EV), F=Frontier. Position 5 encodes trim or series level. Position 8 encodes the engine (A=2.0L 4-cyl, B=2.5L 4-cyl, C=3.5L V6, D=3.7L V6, E=5.6L V8). Position 9 is the check digit — our decoder validates it automatically using the ISO 3779 weighted-sum algorithm. Position 10 is the model year (see our year-code reference), and position 11 is the assembly plant (A=Smyrna, TN, B=Canton, MS, C=Aguascalientes, Mexico, D=Tochigi, Japan, E=Oppama, Japan). Positions 12–17 are the unique serial number for that vehicle.
Because Infiniti may change VDS encoding between model years, treat decoded attributes as informational. Always confirm critical details (engine, trim, drivetrain) against the window sticker, build sheet, or dealer records.
Infiniti VIN Position Breakdown
| Pos. | Section | Standard Meaning | Infiniti Notes |
|---|---|---|---|
| 1 | WMI | Country of manufacture | ISO 3779 region code — e.g. 1=USA, J=Japan, W=Germany |
| 2 | WMI | Manufacturer | Combined with pos. 1–3 identifies Infiniti |
| 3 | WMI | Vehicle type | Infiniti WMI codes: JNK (Japan), JN3 (Japan) |
| 4 | VDS | Vehicle Line | A=Maxima; B=Altima; C=Versa / Sentra; D=370Z / Z; E=Leaf (EV); F=Frontier; G=GT-R; H=Murano |
| 5 | VDS | Series / trim | Trim, series, or drive configuration |
| 6 | VDS | Body / restraint | Body style and/or restraint system (varies by year) |
| 7 | VDS | Restraint / body | Supplemental restraint or body attribute |
| 8 | VDS | Engine | A=2.0L 4-cyl; B=2.5L 4-cyl; C=3.5L V6; D=3.7L V6; E=5.6L V8; F=1.6L Turbo |
| 9 | Check digit | Validation | ISO 3779 weighted-sum check — detects typos and tampering |
| 10 | VIS | Model year | Standard 30-year letter/digit cycle (1980–2039) |
| 11 | VIS | Assembly plant | A=Smyrna, TN; B=Canton, MS; C=Aguascalientes, Mexico; D=Tochigi, Japan; E=Oppama, Japan; F=Kyushu, Japan |
| 12–17 | VIS | Serial number | Unique production sequence at the assembly plant |
Frequently Asked Questions — Infiniti VIN
Where is the VIN on a Infiniti?
Dashboard at windshield, driver's door jamb, and owner's manual service label.
What does JNK mean in a Infiniti VIN?
The WMI prefix JNK identifies a Infiniti vehicle. Infiniti uses JNK and JN3 WMIs for Japan-built models; some U.S.-market Infiniti models share Nissan U.S. WMIs.
How do I decode a Infiniti VIN for free?
Enter your 17-character Infiniti VIN in the decoder above. Our engine validates the check digit, reads the model year, identifies the assembly plant, and applies Infiniti-specific rules for positions 4–8 where available.
Can a Infiniti VIN tell me the engine type?
For most Infiniti models, position 8 encodes the engine family or displacement. Our decoder maps this using manufacturer data. Popular models like Q50 and QX50 are supported.
What plants build Infiniti vehicles?
Position 11 is the assembly plant code. Infiniti operates factories worldwide — our decoder translates the plant letter to a city and country. Infiniti uses JNK and JN3 WMIs for Japan-built models; some U.S.-market Infiniti models share Nissan U.S. WMIs.
How do I verify a Infiniti VIN is genuine?
Use our decoder to validate the check digit at position 9. A valid Infiniti VIN like JN1CV6APX8BM12345 must pass the ISO 3779 check-digit test. Also compare the dashboard VIN with the door jamb label — mismatches may indicate tampering.
Does the model year in a Infiniti VIN match the calendar year?
Not always. Position 10 encodes the model year using the standard 30-year ISO cycle. A vehicle assembled in late 2024 may carry a 2025 model-year code. Always treat position 10 as the manufacturer's designated model year.
Which Infiniti models can I decode?
Our decoder supports all Infiniti models with standard 17-character VINs since 1981, including Q50, QX50, QX55, QX60, QX80. WMI lookup works for every Infiniti VIN; detailed trim and engine data is available where manufacturer encoding is documented.