VIN 1XPBAK9X4LD677422 — 2020 Peterbilt (PTRB) 579
Recorded with Tns Unlimited Llc · USDOT 4169163
Vehicle identity
| VIN | 1XPBAK9X4LD677422 |
| Model year | 2020 |
| Make | Peterbilt (PTRB) |
| Model | 579 |
| Vehicle type | TRUCK TRACTOR |
| License plate | TX R771574 (Texas) |
| Last inspected | 2025-06-18 |
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 |
|---|---|---|---|
| 2025-06-18 | 1XPBAK9X4LD677422 | TX R771574 | TNS UNLIMITED LLC · USDOT 4169163 |
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
Tns Unlimited Llc Active
- USDOT
- 4169163
- MC
- 1603286
- Status
- Active
- Type
- Motor Carrier
- Based in
- Texas City, TX
- Power units
- 10
- Drivers
- 8
- Inspections (24 mo)
- 50
- Crashes (24 mo)
- 0
- Vehicle OOS rate
- 51%
Carrier recorded at the latest inspection in the available records (2025-06-18). 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
1XPBAK9X4LD677422 is a 2020 Peterbilt 579 operated by Tns Unlimited Llc (USDOT 4169163). License plate on its inspection records: TX R771574. 1 roadside inspection on FMCSA record. 3 out-of-service results on record.
What this VIN is
2020 Peterbilt 579 is the vehicle NHTSA’s VIN registry returns for 1XPBAK9X4LD677422. It is a truck-tractor built by PETERBILT MOTORS COMPANY at the DENTON, TEXAS plant. Powertrain: MX-11 engine, 11L displacement, running on diesel. 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 1 FMCSA roadside inspection (most recent activity 2025-06-18). Its records show 3 out-of-service violations across 1 inspection. Out-of-service breakdown: 1 vehicle, 2 driver. Its most recent inspection (2025-06-18) was in Texas, a Level II — walk-around inspection of the driver and the vehicle. Of 5 recorded violations, the most come from Vehicle Maintenance (3), followed by Driver Fitness (2). Vehicle Maintenance covers brakes, lights, tires, load securement and other mechanical condition items.
Operator history
Operated by Tns Unlimited Llc (USDOT 4169163) on 2025-06-18 — 1 inspection, 3 out-of-service.
Full spec sheet (NHTSA vPIC decode)
| Make | PETERBILT |
| Model | 579 |
| Model Year | 2020 |
| 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 | DENTON Where the chassis was assembled — useful for verifying the VIN against the build record. |
| Plant State | TEXAS |
| Plant Country | UNITED STATES (USA) |
| Engine Model | MX-11 The engine family installed at the factory — a major driver of resale value and parts availability. |
| Engine Configuration | In-Line Cylinder layout (e.g. inline-6), the dominant configuration in Class 8 diesels. |
| Engine Cylinders | 6 |
| Displacement L | 11 Engine displacement in liters — bigger generally means more torque for heavy loads. |
| Fuel Type Primary | Diesel Primary fuel — diesel dominates heavy trucking; CNG/electric change maintenance and range. |
| Brake System Type | Air Air vs hydraulic brakes — air brakes are standard on heavy trucks and require an endorsement. |
| Drive Type | 4x2 Axle drive configuration (e.g. 6x4), which affects traction and fuel economy. |
FMCSA BASIC safety category breakdown
| BASIC Category | Violations | Status |
|---|---|---|
| Vehicle Maintenance | 3 | ! Moderate |
| Driver Fitness | 2 | ! Moderate |
| Unsafe Driving | 0 | ✓ Clean |
| Fatigued Driving (HOS) | 0 | ✓ Clean |
| Controlled Substances | 0 | ✓ Clean |
| Hazmat | 0 | ✓ Clean |
Operator & inspection history
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Frequently Asked Questions
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