VIN 3H6KA442XR3166136 — 2024 Polar Tank Trailer (POLA) Polar Tank Trailer
Recorded with Smart Proserve Inc · USDOT 1661680
Vehicle identity
| VIN | 3H6KA442XR3166136 |
| Model year | 2024 |
| Make | Polar Tank Trailer (POLA) |
| Model | Polar Tank Trailer |
| Vehicle type | SEMI-TRAILER |
| License plate | CA 4WR9208 (California) |
| Inspection window | 2026-04-13 to 2026-06-08 |
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 |
|---|---|---|---|
| 2026-06-08 | 3H6KA442XR3166136 | CA 4WR9208 | SMART PROSERVE INC · USDOT 1661680 |
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
Smart Proserve Inc Active
- USDOT
- 1661680
- MC
- 611166
- Status
- Active
- Type
- Carrier & Shipper
- Based in
- Sacramento, CA
- Power units
- 10
- Drivers
- 10
- Inspections (24 mo)
- 60
- Crashes (24 mo)
- 2
- Vehicle OOS rate
- 11.8%
Carrier recorded at the latest inspection in the available records (2026-06-08). 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
3H6KA442XR3166136 is a 2024 Polar Tank Trailer operated by Smart Proserve Inc (USDOT 1661680). License plate on its inspection records: CA 4WR9208. 2 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
2024 Polar Tank Trailer is the vehicle NHTSA’s VIN registry returns for 3H6KA442XR3166136. It is a trailer built by POLAR TANK TRAILER, LLC.
Roadside inspection & out-of-service record
This specific vehicle appears in 2 FMCSA roadside inspections between 2026-04-13 and 2026-06-08. Across those inspections it was never placed out of service. Its most recent inspection (2026-06-08) was in California, a Level III — driver and paperwork only. No violations were recorded against this vehicle in our inspection window.
Operator history
Operated by Smart Proserve Inc (USDOT 1661680) from 2026-04-13 to 2026-06-08 — 2 inspections, none out of service.
Full spec sheet (NHTSA vPIC decode)
| Make | POLAR TANK TRAILER |
| Model | Polar Tank Trailer |
| Model Year | 2024 |
| Series | AL 306/406 |
| 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 | POLAR TANK TRAILER, LLC The legal manufacturer of record in NHTSA’s database. |
| Plant State | CHIHUAHUA |
| Plant Country | MEXICO |
| Axles | 2 Number of axles — ties directly to weight limits and toll/registration class. |
Operator & inspection history
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Related
Frequently Asked Questions
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