Subaru VIN Check
Every modern Subaru VIN begins with a three-character World Manufacturer Identifier. For Subaru, prefixes such as JF1, JF2, 4S3, 4S4 tell you where the vehicle was registered as built and which corporate maker owns the code. 4S3/4S4 indicate Subaru of Indiana Automotive in Lafayette; JF1/JF2 indicate Japan assembly.
After the WMI, positions 4–8 describe the vehicle itself — typically line, series, body, restraint, and engine — while positions 9–17 carry the check digit, model year, plant, and serial. That structure is defined by ISO 3779 and, for U.S.-market vehicles, 49 CFR Part 565.
On this page you can paste any Subaru VIN into the decoder above. We check format (no I, O, or Q), verify the ISO 3779 check digit, resolve the WMI against our registry, and apply Subaru-specific rules researched from NHTSA vPIC, ISO standards, and manufacturer documentation.
Subaru WMI prefixes we decode
| WMI | Country | Notes |
|---|---|---|
JF1 | Japan | Japan-built Subaru |
JF2 | Japan | Japan-built Subaru |
4S3 | United States | Lafayette, IN (SIA) |
4S4 | United States | Lafayette, IN (SIA) |
Remember: a VIN decode shows how the vehicle left the factory. It does not show accidents, title brands, odometer history, or prior owners.
How to Read a Subaru VIN
Here is how DecodeAnyVin interprets a Subaru VIN, and how you can read the same characters manually.
Reading a Subaru VIN by hand
Positions 1–3 (WMI). Expected prefixes include JF1 (Japan), JF2 (Japan), 4S3 (United States), 4S4 (United States). 4S3/4S4 indicate Subaru of Indiana Automotive in Lafayette; JF1/JF2 indicate Japan assembly.
Position 4 (Vehicle Line). Common mappings in our decoder: brand-specific line codes.
Position 5. Usually series, trim, or drivetrain detail for Subaru.
Position 8 (engine / related). Examples: engine / market codes that vary by year.
Position 9. ISO 3779 check digit — DecodeAnyVin validates this automatically.
Position 10. Model year on the standard 30-year letter/digit cycle.
Position 11. Assembly plant. Examples: Subaru plant letters.
Positions 12–17. Production serial unique to that plant line.
Subaru-specific quirks to watch
- VDS codes (4–8) can change when Subaru launches a new platform — charts from a different decade may mislead.
- North American market VINs follow FMVSS 565; vehicles imported privately may still use the same WMI system but different catalog data.
- Always cross-check the decoded plant and engine against the door-jamb sticker before ordering expensive parts.
Decoded attributes are informational. Confirm engine, trim, and drivetrain against the window sticker, build sheet, or a dealer before purchase, insurance, or registration decisions.
Related reading: How to read a VIN, check digit explained, and verify a VIN against a listing.
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 | Subaru-specific model line code |
| 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 | Engine family or displacement code |
| 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 | Subaru factory code |
| 12–17 | VIS | Serial number | Unique production sequence at the assembly plant |
Frequently Asked Questions — Subaru VIN
Where do I find the VIN on a Subaru?
Driver's side dashboard, door jamb, and on the windshield sticker.
What does the WMI JF1 mean on a Subaru?
JF1 is a World Manufacturer Identifier used on Subaru vehicles. 4S3/4S4 indicate Subaru of Indiana Automotive in Lafayette; JF1/JF2 indicate Japan assembly.
How many WMI prefixes does Subaru use?
Subaru uses multiple WMIs depending on plant and vehicle type. In our registry you will see codes such as JF1 (Japan), JF2 (Japan), 4S3 (United States), 4S4 (United States). The first three characters always identify the manufacturer assignment.
Can I decode a Subaru VIN for free on DecodeAnyVin?
Yes. Paste your 17-character Subaru VIN into the form on this page. We validate the ISO 3779 check digit, resolve the WMI, read the model year and plant, and apply Subaru-specific rules for positions 4–8 where available — no signup required.
Does a Subaru VIN show the engine?
Often yes. On many Subaru lines, position 8 (sometimes nearby VDS positions) encodes engine family. Coverage is strongest for high-volume models such as Outback and Forester; exotic or late-cycle codes may need dealer confirmation.
How do I know a Subaru VIN was not altered?
Run the check digit (position 9). Example structure: 4S4BSACCX5H312345. Also match the windshield VIN to the door-jamb label and reject plates that look restamped or glued. A decode cannot prove title status — only factory identity.
Is the model year on a Subaru VIN always the calendar year?
No. Position 10 is the manufacturer's model year on the ISO 30-year cycle. A vehicle built in autumn may already carry next year's code. Use it as the factory model year, not the build calendar date.
Which Subaru models does DecodeAnyVin support?
Any Subaru with a standard 17-character VIN (typically 1981+), including Outback, Forester, Crosstrek, Impreza, WRX, Ascent, Solterra. WMI and year/plant decode work broadly; detailed trim/engine depth depends on documented VDS rules for that platform.