Subaru VIN Decoder: How to Read a Subaru VIN (JF1, JF2, 4S3, 4S4)

To decode a Subaru VIN, read the first three characters for the builder and body type (JF1 is common on Japan-built cars like WRX; JF2 is common on Japan-built SUVs and wagons like Crosstrek and Forester; 4S3 and 4S4 are Lafayette, Indiana builds for Legacy and Outback), then positions 4-8 for model and series, 9 for the check digit, 10 for model year, and 11 for the plant. A clean decode only shows factory data, so pull a history report before you pay.

We spent part of mid October 2026 running Subaru patterns through NHTSA's free vPIC decoder, because Outback shoppers still argue about Japan vs Indiana builds as if one is automatically better. If you want the general version first, read how to decode a VIN; this page sticks to Subaru. For shopping a specific wagon, our used Subaru Outback buying guide covers wear and history after the decode.

Positions 1-3: JF1, JF2, 4S3, 4S4

The World Manufacturer Identifier separates cars, SUVs, and US plants. In our tests, a 2018 Crosstrek Premium pattern starting JF2GTADC decoded as Subaru Corporation in Ota, Gunma, Japan, AWD, 2.0-liter naturally aspirated. A 2019 Forester Limited pattern starting JF2SKAUC also came back Gunma, 2.5-liter. A 2018 WRX base pattern starting JF1VA1A6 decoded as Gunma, sedan, 2.0-liter turbo (engine model DIB in vPIC). A 2019 Outback Base pattern starting 4S4BSAAC decoded as Subaru of America, Inc., Lafayette, Indiana, 2.5-liter. A 2019 Legacy Base pattern starting 4S3BNAAC also pointed at Lafayette with a 2.5-liter.

So an Outback can legitimately start 4S4 when it was built in Indiana, and a Crosstrek or Forester often starts JF2 when it came from Gunma. What should worry you is a mismatch between the seller's story and the WMI, or a VIN that fails the door-jamb match. Use the checks in how to find and verify a VIN before you argue about plant pride.

Positions 4-8, engines, year, and plant

Subaru packs model and series into positions 4-8. Marketing names like Outback, Forester, Crosstrek, Impreza, and WRX show up in the model field once vPIC finishes. Engine talk on the lot still mentions FB25, FA24, and older EJ25 head-gasket era cars; vPIC often returns displacement and a short engine model string rather than the enthusiast code, so compare the decode to the under-hood label instead of memorizing one letter. Our Lafayette Outback returned "NA U5" with 2.5 liters; the Gunma Crosstrek returned "Naturally Aspirated" with 2.0 liters; the WRX returned "DIB" with 2.0 liters.

Position 9 is the check digit under 49 CFR 565.15. A typo usually breaks it; a cloned VIN can still pass, so read our VIN cloning page if the paperwork feels too clean. Position 10 is the model year letter. Position 11 is the plant; our decodes returned Ota/Gunma for JF1/JF2 patterns and Lafayette for 4S3/4S4. Subaru's own owner vehicle resources page is a useful next stop for manuals and recall lookups once you have the VIN.

After the decode: recalls and history

Run the exact VIN through Subaru's recall tools and NHTSA's VIN lookup, then save a screenshot. Our NHTSA recall check by VIN guide covers the federal side. For crash ratings on a specific year, check the IIHS Outback ratings or the matching Forester year page rather than assuming every trim passed the same test.

The decode cannot show title brands, flood brands, auction damage, or odometer gaps. Those come from DMV, insurance, auction, and shop records, which is what CARFAX describes as the source of its reports. Pull your own report rather than trusting a seller PDF. As of mid October 2026, a CARFAX report through us is about $5.50 as a guest or about $4.50 as a member, and a CARFAX plus AutoCheck bundle is about $6.75, against roughly $39.99 to $44.99 at retail. Prices move, so confirm at checkout. We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck, or Experian. Honestly, a salt-belt Outback with perfect paint and no underbody photos is still a crawl-under-the-car job after the decode. Car and Driver's Outback coverage is a fair place to cross-check generation changes after you finish the VIN.

Sources

• NHTSA vPIC VIN Decoder
• 49 CFR 565.15 VIN requirements
• Subaru: owner vehicle resources
• IIHS: 2025 Subaru Outback ratings
• CARFAX: Vehicle History Reports
• Car and Driver: Subaru Outback