Factory build sheet
2021 Subaru Outback Premium
Build 4W4BTACC-M
VIN positions 1 through 8 read 4W4BTACC and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Outback whose VIN starts 4W4BTACC and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 1 of them.
- Decoded Jul 7, 2026
- 1 known VINs
How this VIN pattern is read
A 17-character VIN carries two kinds of information: what was built, and which one it is. This page is the first kind — the nine highlighted positions.
| Positions | Characters | What they encode |
|---|---|---|
| 1–3 | 4W4 | World manufacturer identifier |
| 4–8 | BTACC | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | M | Model year — 2021 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
NHTSA safety ratings
Crash-test results are published per model year and body style, so they cover the 2021 Subaru Outback as a whole rather than this build alone.
Overall
★★★★★ 5 / 5
Frontal crash
★★★★★ 5 / 5
Side crash
★★★★★ 5 / 5
Rollover
★★★★ ★ 4 / 5
4 recall campaigns are recorded for the 2021 Outback. Recalls are issued per VIN range — check the VIN of the car you are looking at, not the model.
1 vehicles carry this build
Every VIN we have decoded to 4W4BTACC-M shares the specification above.
- 1 Known VINs
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Where this data comes from
Specification fields are decoded from the manufacturer's filings in the NHTSA vPIC database, keyed on VIN positions 1–8 and 10. We publish the filed values as they stand and leave out anything the filing does not record.
Vehicle counts come from the 1 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.