Factory build sheet
2021 Subaru Legacy Limited+M/R+Navi(HK)
Build 4S3BWGN6-M · 2.4L 4cyl · All-wheel drive · Sedan
VIN positions 1 through 8 read 4S3BWGN6 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Legacy whose VIN starts 4S3BWGN6 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 1,469 of them.
- Decoded Jul 7, 2026
- 1,469 known VINs
- 27 listed for sale now
Factory specification
As filed by Subaru with NHTSA for this build. Fields the filing does not record are left out entirely — a missing row means no recorded value, not a missing feature.
Engine
- Displacement
- 2.4 L
- Cylinders
- 4
- Engine model
- 24l h4 16v gdi dohc turbo
- Horsepower
- 260 hp
- Fuel type
- Gasoline
Drivetrain
- Drive type
- All-wheel drive
Body & chassis
- Body class
- Sedan/Saloon
- NHTSA body type
- PASSENGER CAR
- Doors
- 4
- Seats
- 5
- Seat rows
- 2
- Manufacturer
- SUBARU OF AMERICA, INC
Weight rating
- GVWR class
- Class 1
- GVWR
- 6,000 lb or less
Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.
Driver assistance, as built
- Forward collision warning Standard
- Crash imminent braking Standard
- Lane departure warning Standard
- Lane keeping assistance Standard
- Adaptive cruise control Standard
Systems the filing does not record are not listed above. Check the window sticker of the exact car before you rely on any single feature.
What this build asks today
Asking prices of live dealer listings decoded to this exact configuration — narrower than the trim-level figure, because every car counted here shares the same engine, transmission and drivetrain.
$21,633 median asking price · 44 listings · as of Aug 30, 2026
Low 2% of listings $15,295 Top 2% of listings $25,998
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 | 4S3 | SUBARU OF AMERICA, INC · World manufacturer identifier |
| 4–8 | BWGN6 | 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 Legacy as a whole rather than this build alone.
Overall
★★★★★ 5 / 5
Frontal crash
★★★★★ 5 / 5
Side crash
★★★★★ 5 / 5
Rollover
★★★★★ 5 / 5
3 recall campaigns are recorded for the 2021 Legacy. Recalls are issued per VIN range — check the VIN of the car you are looking at, not the model.
1,469 vehicles carry this build
Every VIN we have decoded to 4S3BWGN6-M shares the specification above.
- 1,469 Known VINs
- 27 Listed for sale now
- 44 Priced listings
- $21,633 Median asking
Cars are filed by a fixed rule based on the VIN, so a car never moves between groups.
Keep going
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.
Prices are asking prices from 44 live dealer listings decoded to this build , last updated August 30, 2026 . They are what sellers ask, not what buyers paid.
Vehicle counts come from the 1,469 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.