Factory build sheet
2021 Ram 3500 BIG Horn
Build 3C63R3BJ-M · 6.4L 8cyl · Four-wheel drive · Pickup
VIN positions 1 through 8 read 3C63R3BJ and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every 3500 whose VIN starts 3C63R3BJ and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 16 of them.
- Decoded Jul 7, 2026
- 16 known VINs
Factory specification
As filed by Ram 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
- 6.4 L
- Cylinders
- 8
- Configuration
- V-Shaped
- Engine model
- 64l v8 16v mpfi ohv
- Engine manufacturer
- FCA
- Horsepower
- 410 hp
- Fuel type
- Gasoline
Drivetrain
- Drive type
- Four-wheel drive
- Brake system
- Hydraulic
Body & chassis
- Body class
- Pickup
- NHTSA body type
- TRUCK
- Cab type
- Regular
- Manufacturer
- CHRYSLER DE MEXICO TOLUCA
Weight rating
- GVWR class
- Class 3
- GVWR
- 10,001–14,000 lb
Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.
The same build, other model years
Ram used the VIN pattern 3C63R3BJ for 3 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
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 | 3C6 | CHRYSLER DE MEXICO TOLUCA · World manufacturer identifier |
| 4–8 | 3R3BJ | 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 |
16 vehicles carry this build
Every VIN we have decoded to 3C63R3BJ-M shares the specification above.
- 16 Known VINs
- 3C63R3BJ 4MG618084
- 3C63R3BJ 2MG671544
- 3C63R3BJ 2MG600392
- 3C63R3BJ 4MG519068
- 3C63R3BJ 3MG670967
- 3C63R3BJ 5MG572037
- 3C63R3BJ 1MG642939
- 3C63R3BJ 1MG593449
- 3C63R3BJ 1MG625431
- 3C63R3BJ 0MG603761
- 3C63R3BJ 5MG623651
- 3C63R3BJ 8MG623658
- 3C63R3BJ XMG505286
- 3C63R3BJ 5MG592837
- 3C63R3BJ 8MG515038
- 3C63R3BJ 8MG507084
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 16 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.