VIN 5KJJALD18MPML1398 — 2021 Western Star (WSTR) 4900
Recorded with Samuel J Piazza & Son Inc · USDOT 391314
Vehicle identity
| VIN | 5KJJALD18MPML1398 |
| Model year | 2021 |
| Make | Western Star (WSTR) |
| Model | 4900 |
| Vehicle type | TRUCK TRACTOR |
| License plate | CA 9G20931 (California) |
| Inspection window | 2024-12-02 to 2026-05-09 |
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 |
|---|---|---|---|
| 2026-05-09 | 5KJJALD18MPML1398 | CA 9G20931 | SAMUEL J PIAZZA & SON INC · USDOT 391314 |
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
Samuel J Piazza & Son Inc Active
- USDOT
- 391314
- MC
- 231685
- Status
- Active
- Type
- Carrier & Shipper
- Based in
- South Gate, CA
- Power units
- 38
- Drivers
- 49
- Inspections (24 mo)
- 144
- Crashes (24 mo)
- 0
- Vehicle OOS rate
- 7.6%
Carrier recorded at the latest inspection in the available records (2026-05-09). 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
5KJJALD18MPML1398 is a 2021 Western Star 4900 operated by Samuel J Piazza & Son Inc (USDOT 391314). License plate on its inspection records: CA 9G20931. 5 roadside inspections on FMCSA record. No out-of-service violations are recorded for this VIN in the available inspection records. Other violations may still be present.
What this VIN is
2021 Western Star 4900 is the vehicle NHTSA’s VIN registry returns for 5KJJALD18MPML1398. It is a truck-tractor built by DAIMLER TRUCK NORTH AMERICA LLC at the PORTLAND, OREGON plant. Powertrain: Diesel DD16 engine, 15.6L 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 5 FMCSA roadside inspections between 2024-12-02 and 2026-05-09. Across those inspections it was never placed out of service. Its most recent inspection (2026-05-09) was in Arizona, a Level III — driver and paperwork only. Of 4 recorded violations, the most come from Vehicle Maintenance (2), followed by Unsafe Driving (1). Vehicle Maintenance covers brakes, lights, tires, load securement and other mechanical condition items.
Operator history
Operated by Samuel J Piazza & Son Inc (USDOT 391314) from 2024-12-02 to 2026-05-09 — 5 inspections, none out of service.
Full spec sheet (NHTSA vPIC decode)
| Make | WESTERN STAR |
| Model | 4900 |
| Model Year | 2021 |
| 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 | DAIMLER TRUCK NORTH AMERICA LLC The legal manufacturer of record in NHTSA’s database. |
| Plant City | PORTLAND Where the chassis was assembled — useful for verifying the VIN against the build record. |
| Plant State | OREGON |
| Plant Country | UNITED STATES (USA) |
| Engine Model | Diesel DD16 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 | 15.6 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 | 6x4 Axle drive configuration (e.g. 6x4), which affects traction and fuel economy. |
FMCSA BASIC safety category breakdown
| BASIC Category | Violations | Status |
|---|---|---|
| Vehicle Maintenance | 2 | ! Moderate |
| Unsafe Driving | 1 | — Minor |
| Fatigued Driving (HOS) | 1 | — Minor |
| Driver Fitness | 0 | ✓ Clean |
| Controlled Substances | 0 | ✓ Clean |
| Hazmat | 0 | ✓ Clean |
Operator & inspection history
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