Subaru Outback VIN Decoder: Trim, Engine and Plant Codes

On a Subaru Outback VIN, positions 4 and 5 are the model (BT on the 2020-2025 Outback, BU on the 2026), position 6 is the engine, position 7 is the trim, position 8 is the airbag package and weight class, and position 11 is the plant. The big change: the 2021 and 2025 filings show the Outback as 4S4 built at Subaru of Indiana Automotive in Lafayette, while the 2026 filing shows JF2 and plant code Y, the Yajima plant in Japan. So a 2026 Outback with a 4S4 prefix does not match Subaru's own paperwork.

On November 8, 2026 we pulled Subaru's Part 565 VIN submissions for the 2021, 2025 and 2026 model years from NHTSA's vPIC library. What jumped out was not the plant move, though. It was how often the trim letters got reshuffled. A D at position 7 has meant a Premium with keyless entry and a Limited, depending on the year, and that is exactly the kind of thing a lazy online decoder misses.

Positions 1 to 5: who built it and what it is

The 2021 and 2025 tables define 4S4 as manufactured by Subaru Corporation and assembled by SIA, multipurpose vehicle, with BT for Subaru Outback (wagon). The 2026 table defines JF2 as manufactured by Subaru Corporation, MPV, with BU for Subaru Outback. Position 11 backs that up: 3 is SIA in Lafayette, Indiana in the earlier filings, and Y is the Yajima plant in Japan in the 2026 one. Every filing pairs the plant code with full-time AWD and a CVT.

If you are not sure what the first three characters mean on other brands, our WMI explainer covers that, and the full Subaru lineup is in our Subaru VIN decoder.

Position 6: the engine letter changed too

In the 2021 and 2025 filings, A is the 2.5-liter four rated at 182 hp and G is the 2.4-liter at 260 hp. The 2025 sheet calls G a turbo; the 2021 sheet's wording for G says NA, which looks like a slip given the 260 hp, but that is what it says. In the 2026 filing the letters move: P is the 2.5-liter at 180 hp and R is the 2.4-liter turbo at 260 hp.

So on a 2021 to 2025 Outback, a G is the turbo. On a 2026, the turbo is R. If you are shopping for a turbo Outback because you tow a small trailer or just hate merging slowly, this one character is the cheapest way to confirm you are getting the engine you are paying for.

Position 7: trim, and why D is a trap

Here is how the trim letters line up in the three filings:

• 2021: A Base, C Premium, D Premium with SMART entry, F Premium with SMART, moonroof and navigation, J Onyx Edition, L Onyx Edition with moonroof and navigation, M Limited, N Limited with moonroof and navigation, P Touring.
• 2025: A Base, C Premium, D Premium with SMART, F Premium with SMART, moonroof and navigation, L Onyx Edition, N Limited, P Touring, S Wilderness, U Wilderness with moonroof and navigation.
• 2026: A Premium, B Premium with moonroof, navigation and heated steering wheel, D Limited, E Touring, G 2.4R-Limited, J 2.4R-Touring, K Wilderness, L Wilderness with moonroof, navigation and multi-view monitor, M the same plus Wilderness leather seats.

Look at D and L. D was a Premium package through 2025 and is a Limited on the 2026. L was an Onyx Edition and is now a Wilderness. A seller copying a trim from an old forum chart could be honestly wrong, and you would be the one overpaying.

Position 8 to 17

Position 8 combines the airbag package and GVWR class. The 2021 and 2025 filings list C for Class C (4,001 to 5,000 lb) and D for Class D (5,001 to 6,000 lb), both with frontal, seat-mounted side, curtain, driver knee and front passenger seat cushion airbags. The 2026 table lists D only. Most buyers can skip this position, but if it does not match anything in the table for that year, treat it like any other VIN that does not add up.

Position 9 is the check digit (0 to 9 or X), position 10 is the model year (M for 2021, S for 2025, T for 2026), position 11 is the plant, and 12 to 17 are the sequence number. The year table comes from 49 CFR 565.15, and our 10th digit guide lists every letter.

A quick worked example

Subaru's own sample VIN on the 2025 sheet is 4S4BTAACXS3100001. Read it: Indiana-built Outback, 2.5-liter, Base trim, Class C airbag package, check digit, 2025, Lafayette. The 2026 sample is JF2BUPADXTY450001: Japan-built Outback, 2.5-liter, Premium, Class D package, 2026, Yajima. Two VINs, one year apart, and almost every position means something different.

So when a 2026 listing shows a VIN starting 4S4BT, or a 2025 shows JF2BU, stop and look at the VIN plate on the dash and the sticker on the door jamb yourself. It might be a typo in the ad. It might also be a VIN borrowed from another car, and that is a much bigger problem than a wrong trim.

What decoding cannot catch

Decoding the VIN tells you what Subaru built. It does not tell you whether the CVT has been slipping, whether the car sat in floodwater, or whether the odometer was touched. Check our Subaru CVT warranty extension guide, run Subaru's recall check by VIN, and read the used Outback buying guide before you sign.

A report bought directly from CARFAX is usually about $39.99 to $44.99. CarVins resells CARFAX and AutoCheck reports under license and is not part of CARFAX, AutoCheck or Experian. Lately a guest report has been around $5.50, members about $4.50, and both reports together roughly $6.75, but prices shift, so confirm at checkout before you pay. Then compare the report's VIN to the one stamped on the car. Seller PDFs get edited more than people think.

Sources

• Subaru 2021MY VIN submission GR20-039, including Outback (NHTSA vPIC)
• Subaru 2025MY VIN submission GR24-056, including Outback (NHTSA vPIC)
• Subaru 2026MY VIN submission GR26-048, including Outback (NHTSA vPIC)
• 49 CFR 565.15 (eCFR): required VIN content
• NHTSA vPIC VIN decoder