Factory build sheet
2021 Subaru Impreza Base
Build 4S3GKAA6-M · 2L 4cyl · All-wheel drive · Sedan
VIN positions 1 through 8 read 4S3GKAA6 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Impreza whose VIN starts 4S3GKAA6 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 156 of them.
- Decoded Jul 7, 2026
- 156 known VINs
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 L
- Cylinders
- 4
- Engine model
- NA
- Horsepower
- 152 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.
The same build, other model years
Subaru used the VIN pattern 4S3GKAA6 for 7 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
- 2017 Base 2L 4cyl Sedan · 2,090 vehicles code H $11,500
- 2018 Base 2L 4cyl Sedan · 3,360 vehicles code J $12,900
- 2019 Base 2L 4cyl Sedan · 3,523 vehicles code K $12,900
- 2020 Base 2L 4cyl Sedan · 165 vehicles code L $13,877
-
2021 You are here code M
- 2022 Base 2L 4cyl Sedan · 274 vehicles code N
- 2023 Base 2L 4cyl Sedan · 185 vehicles code P $20,795
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 | GKAA6 | 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 Impreza as a whole rather than this build alone.
Overall
★★★★★ 5 / 5
Frontal crash
★★★★★ 5 / 5
Side crash
★★★★★ 5 / 5
Rollover
★★★★★ 5 / 5
2 recall campaigns are recorded for the 2021 Impreza. Recalls are issued per VIN range — check the VIN of the car you are looking at, not the model.
156 vehicles carry this build
Every VIN we have decoded to 4S3GKAA6-M shares the specification above.
- 156 Known VINs
Cars are filed by a fixed rule based on the VIN, so a car never moves between groups.
Neighboring configurations
Other factory configurations of the Impreza, each with its own build sheet. The set is fixed by the VIN patterns themselves, so it does not shuffle as prices or inventory move.
- 2021 Base+ES 2L 4-cyl · Sedan saloon 1,459 vehicles · $18,000 median
- 2021 Premium+ES+BSD 2L 4-cyl · Sedan saloon 667 vehicles · $15,900 median
- 2021 Sport+H/K+ES+BSD 2L 4-cyl · Sedan saloon · AWD 350 vehicles · $22,995 median
- 2021 Limited+Navi+ES+BSD 2L 4-cyl · Sedan saloon · AWD 121 vehicles
- 2021 Base+ES 2L 4-cyl · Hatchback liftback notchback 3,216 vehicles · $16,599 median
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.
Vehicle counts come from the 156 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.