VIN 4KNFF5131ML160203 — 2021 Monroe Towmaster (MONON TRAI) Monroe Towmaster
Recorded with Wisconsin Operating Engineers Skill Improvement & Apprenticeship Fund · USDOT 505809
Vehicle identity
| VIN | 4KNFF5131ML160203 |
| Model year | 2021 |
| Make | Monroe Towmaster (MONON TRAI) |
| Model | Monroe Towmaster |
| Vehicle type | SEMI-TRAILER |
| License plate | WI 795966 (Wisconsin) |
| Last inspected | 2025-03-26 |
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 |
|---|---|---|---|
| 2025-03-26 | 4KNFF5131ML160203 | WI 795966 | WISCONSIN OPERATING ENGINEERS SKILL IMPROVEMENT & APPRENTICESHIP FUND · USDOT 505809 |
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
Wisconsin Operating Engineers Skill Improvement & Apprenticeship Fund Active
- USDOT
- 505809
- MC
- —
- Status
- Active
- Type
- Carrier & Shipper
- Based in
- Coloma, WI
- Power units
- 7
- Drivers
- 8
- Inspections (24 mo)
- 2
- Crashes (24 mo)
- 0
- Vehicle OOS rate
- 0%
Carrier recorded at the latest inspection in the available records (2025-03-26). 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
4KNFF5131ML160203 is a 2021 Monroe Towmaster operated by Wisconsin Operating Engineers Skill Improvement & Apprenticeship Fund (USDOT 505809). License plate on its inspection records: WI 795966. 1 roadside inspection 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 Monroe Towmaster is the vehicle NHTSA’s VIN registry returns for 4KNFF5131ML160203. It is a trailer built by MONROE TOWMASTER, LLC at the LITCHFIELD, MINNESOTA plant.
Roadside inspection & out-of-service record
This specific vehicle appears in 1 FMCSA roadside inspection (most recent activity 2025-03-26). Across those inspections it was never placed out of service. Its most recent inspection (2025-03-26) was in Wisconsin, a Level III — driver and paperwork only. No violations were recorded against this vehicle in our inspection window.
Operator history
Operated by Wisconsin Operating Engineers Skill Improvement & Apprenticeship Fund (USDOT 505809) on 2025-03-26 — 1 inspection, none out of service.
Full spec sheet (NHTSA vPIC decode)
| Make | MONROE TOWMASTER |
| Model | Monroe Towmaster |
| Model Year | 2021 |
| Vehicle Type | TRAILER NHTSA’s top-level vehicle category derived from the VIN. |
| Body Class | Trailer The body style NHTSA assigns from the VIN — e.g. truck-tractor, straight truck, or cutaway. |
| Manufacturer | MONROE TOWMASTER, LLC The legal manufacturer of record in NHTSA’s database. |
| Plant City | LITCHFIELD Where the chassis was assembled — useful for verifying the VIN against the build record. |
| Plant State | MINNESOTA |
| Plant Country | UNITED STATES (USA) |
| Axles | 3 Number of axles — ties directly to weight limits and toll/registration class. |
Operator & inspection history
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Frequently Asked Questions
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