VIN 1XPFDB9X4YS523921 — 2000 Peterbilt 378
Recorded with Old Bull Transportation Llc · USDOT 4115712
Vehicle identity
| VIN | 1XPFDB9X4YS523921 |
| Model year | 2000 |
| Make | Peterbilt |
| Model | 378 |
| Vehicle type | TRUCK TRACTOR |
| License plate | CO DZCQ27 (Colorado) |
| Inspection window | 2025-03-27 to 2026-07-15 |
Recorded vehicle, plate and carrier history
These are dated observations in the records available to us. They do not establish ownership, a sale, a transfer date, or continuous use between observations. The latest observation may not describe today’s vehicle or carrier.
| Observed dates | VIN | Plate | Reported carrier |
|---|---|---|---|
| 2026-07-15 | 1XPFDB9X4YS523921 | CO DZCQ27 | OLD BULL TRANSPORTATION LLC · USDOT 4115712 |
Evidence: FMCSA inspection observations and retained snapshots of our vehicle records. Coverage is incomplete; an unreported change cannot be dated from these records.
Most recently recorded carrier for this vehicle
Old Bull Transportation Llc Active
- USDOT
- 4115712
- MC
- —
- Status
- Active
- Type
- Motor Carrier
- Based in
- Commerce City, CO
- Power units
- 1
- Drivers
- 2
- Inspections (24 mo)
- 2
- Crashes (24 mo)
- 0
- Vehicle OOS rate
- 100%
Carrier recorded at the latest inspection in the available records (2026-07-15). This does not establish current ownership or confirm that the carrier still operates this vehicle.
View full carrier profile →Authority, insurance & bonds, safety scores, crash history, inspections and the full fleet list.What this means
1XPFDB9X4YS523921 is a 2000 Peterbilt 378 operated by Old Bull Transportation Llc (USDOT 4115712). License plate on its inspection records: CO DZCQ27. 2 roadside inspections on FMCSA record. 4 out-of-service results on record.
What this VIN is
2000 Peterbilt 378 is the vehicle NHTSA’s VIN registry returns for 1XPFDB9X4YS523921. It is a truck-tractor built by PETERBILT MOTORS COMPANY at the SEATTLE, WASHINGTON plant. Powertrain: 3406/C15/C16 engine. Its gross vehicle weight rating (Class 8: 33,001 lb and above (14,969 kg and above)) places it in Class 8 heavy-duty (33,001 lb GVWR and above) — the line-haul tractor / heavy straight-truck tier.
Roadside inspection & out-of-service record
This specific vehicle appears in 2 FMCSA roadside inspections between 2025-03-27 and 2026-07-15. Its records show 4 out-of-service violations across 2 inspections. Out-of-service breakdown: 3 vehicle, 1 driver. Its most recent inspection (2026-07-15) was in Colorado, a Level I — full inspection of the driver and the vehicle. Of 14 recorded violations, the most come from Vehicle Maintenance (13), followed by Driver Fitness (1). Vehicle Maintenance covers brakes, lights, tires, load securement and other mechanical condition items.
Operator history
Operated by Old Bull Transportation Llc (USDOT 4115712) from 2025-03-27 to 2026-07-15 — 2 inspections, 4 out-of-service.
Full spec sheet (NHTSA vPIC decode)
| Make | PETERBILT |
| Model | 378 |
| Model Year | 2000 |
| Vehicle Type | TRUCK NHTSA’s top-level vehicle category derived from the VIN. |
| Body Class | Truck-Tractor The body style NHTSA assigns from the VIN — e.g. truck-tractor, straight truck, or cutaway. |
| G V W R | Class 8: 33,001 lb and above (14,969 kg and above) Class 8 heavy-duty (33,001 lb GVWR and above) — the line-haul tractor / heavy straight-truck tier |
| Manufacturer | PETERBILT MOTORS COMPANY The legal manufacturer of record in NHTSA’s database. |
| Plant City | SEATTLE Where the chassis was assembled — useful for verifying the VIN against the build record. |
| Plant State | WASHINGTON |
| Plant Country | UNITED STATES (USA) |
| Engine Model | 3406/C15/C16 The engine family installed at the factory — a major driver of resale value and parts availability. |
| Brake System Type | Air Air vs hydraulic brakes — air brakes are standard on heavy trucks and require an endorsement. |
| Drive Type | 6x4 Axle drive configuration (e.g. 6x4), which affects traction and fuel economy. |
FMCSA BASIC safety category breakdown
| BASIC Category | Violations | Status |
|---|---|---|
| Vehicle Maintenance | 13 | ⚠ High |
| Driver Fitness | 1 | — Minor |
| Unsafe Driving | 0 | ✓ Clean |
| Fatigued Driving (HOS) | 0 | ✓ Clean |
| Controlled Substances | 0 | ✓ Clean |
| Hazmat | 0 | ✓ Clean |
Operator & inspection history
Related vehicles
- 2C9KBN2R7JM183486 MIDLAND IN (1 insp)
- 48XFF3523K1013522 TRAVIS TRA (1 insp)
Related
Frequently Asked Questions
What does VIN 1XPFDB9X4YS523921 decode to?
Why was 2000 Peterbilt 378 VIN 1XPFDB9X4YS523921 placed out of service?
What license plate is on VIN 1XPFDB9X4YS523921?
Vetting a used truck purchase?
Tell us what you're looking for and we'll send matching new or used trucks — no obligation.