Subaru VIN Check
Every Subaru 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 Subaru VIN helps you verify a used-vehicle listing, confirm the correct parts and service history, check for open recalls, and detect potential title fraud.
Subaru uses manufacturer-specific encoding in the Vehicle Descriptor Section (positions 4–8). Position 4 typically identifies the model line — for example, popular Subaru models include Outback, Forester, Crosstrek, Impreza, WRX, Ascent, Solterra. 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. 4S3/4S4 indicate Subaru of Indiana Automotive in Lafayette; JF1/JF2 indicate Japan assembly.
Subaru is known for symmetrical all-wheel drive and boxer engines standard on most models. The Indiana plant is one of the largest automotive exporters from the United States by value.
How to Read a Subaru VIN
To read a Subaru VIN manually, start with the WMI (positions 1–3) to confirm the manufacturer and country of origin. For Subaru, the WMI prefixes in our database include JF1, JF2, 4S3, 4S4 and others depending on where the vehicle was built.
Position 4 encodes the Vehicle Line. Common values include A=Impreza, B=Legacy, C=Outback, D=Forester, E=WRX / STI, F=BRZ. Position 5 encodes trim or series level. Position 8 encodes the engine (A=2.0L Boxer, B=2.5L Boxer, C=3.6L Boxer H6, D=2.0L Turbo Boxer, E=2.4L Turbo Boxer). 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=Gunma, Japan, B=Ota, Japan, C=Lafayette, IN, D=Yajima, Japan, E=Ebisu, Japan). Positions 12–17 are the unique serial number for that vehicle.
Because Subaru 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.
Subaru VIN Position Breakdown
| Pos. | Section | Standard Meaning | Subaru 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 Subaru |
| 3 | WMI | Vehicle type | Subaru WMI codes: JF1 (Japan), JF2 (Japan), 4S3 (United States), 4S4 (United States) |
| 4 | VDS | Vehicle Line | A=Impreza; B=Legacy; C=Outback; D=Forester; E=WRX / STI; F=BRZ; G=Ascent; H=Crosstrek |
| 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 Boxer; B=2.5L Boxer; C=3.6L Boxer H6; D=2.0L Turbo Boxer; E=2.4L Turbo Boxer; F=Electric |
| 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=Gunma, Japan; B=Ota, Japan; C=Lafayette, IN; D=Yajima, Japan; E=Ebisu, Japan; F=FHI Gunma |
| 12–17 | VIS | Serial number | Unique production sequence at the assembly plant |
Frequently Asked Questions — Subaru VIN
Where is the VIN on a Subaru?
Driver's side dashboard, door jamb, and on the windshield sticker.
What does JF1 mean in a Subaru VIN?
The WMI prefix JF1 identifies a Subaru vehicle. 4S3/4S4 indicate Subaru of Indiana Automotive in Lafayette; JF1/JF2 indicate Japan assembly.
How do I decode a Subaru VIN for free?
Enter your 17-character Subaru VIN in the decoder above. Our engine validates the check digit, reads the model year, identifies the assembly plant, and applies Subaru-specific rules for positions 4–8 where available.
Can a Subaru VIN tell me the engine type?
For most Subaru models, position 8 encodes the engine family or displacement. Our decoder maps this using manufacturer data. Popular models like Outback and Forester are supported.
What plants build Subaru vehicles?
Position 11 is the assembly plant code. Subaru operates factories worldwide — our decoder translates the plant letter to a city and country. 4S3/4S4 indicate Subaru of Indiana Automotive in Lafayette; JF1/JF2 indicate Japan assembly.
How do I verify a Subaru VIN is genuine?
Use our decoder to validate the check digit at position 9. A valid Subaru VIN like 4S4BSACC3H3123456 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 Subaru 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 Subaru models can I decode?
Our decoder supports all Subaru models with standard 17-character VINs since 1981, including Outback, Forester, Crosstrek, Impreza, WRX, Ascent, Solterra. WMI lookup works for every Subaru VIN; detailed trim and engine data is available where manufacturer encoding is documented.