Equipment unit · VIN-decoded · NHTSA vPIC

2025 Polar Tank Trailer

3H6HD393XS3167628 · Trailer · TRAILER
Carriers run under2
14 mo
Inspections4
all-time
OOS inspections0
of 4
First seenNov 7, 2024
CO
Last seenJan 25, 2026
UT
Inspected under 2 different carriers in 14 months
A unit that bounces between many operators can indicate slip-seating, heavy sub-haul, or double-brokering. Review the carrier timeline below for load integrity — context for human judgment, not a verdict.
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
3H6HD393XS3167628
Make
Polar Tank Trailer
Model
Polar Tank Trailer
Model year
2025
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 12, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
3H6

Deterministic · VIN positions 1–3.

Vehicle descriptor section
HD393

Deterministic · VIN positions 4–8.

Check digit
X · valid

Deterministic · position 9; calculated value X.

Model year candidates
1995 or 2025

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
167628

Deterministic · positions 12–17 for a North American WMI.

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Make
POLAR TANK TRAILER

Prefix basis · 23 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 23 decoded VINs at 100.0% prefix purity.

Model line
Not established

No sourced model-line label is established.

No source established for this field.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

Federal observation (NHTSA vPIC)

What the federal corpus observed directly for this exact VIN — independent of, and sometimes more specific than, the prefix-level inference above.

Observed model year
2025

Observed directly for this VIN via NHTSA vPIC.

Observed make
POLAR TANK TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Polar Tank Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

Observed directly for this VIN via NHTSA vPIC.

Not established

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Nov 7, 2024 – Jan 25, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 25, 2026UTIII · Driver-only0SUMMIT OIL COMPANY LLC 709530TW1065/ID
Jul 20, 2025UTIII · Driver-only1SUMMIT OIL COMPANY LLC 709530Z515213/UT
Feb 13, 2025UTI · Full1SUMMIT OIL COMPANY LLC 709530Z515213/UT
Nov 7, 2024COIII · Driver-only0JZ TRUCKING LLC 2092127TEMP 1195064/OK
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SUMMIT OIL COMPANY LLC709530Feb 13, 2025Jan 25, 20263UT
JZ TRUCKING LLC2092127Nov 7, 2024Nov 7, 20241CO
Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.
04

Plate & unit-number history

The same truck under different plate registrations across carriers

PlateState / prov.Unit no.CarrierDate rangeInsp.
TW1065IDSUMMIT OIL COMPANY LLCJan 25, 2026Jan 25, 20261
Z515213UTSUMMIT OIL COMPANY LLCFeb 13, 2025Jul 20, 20252
TEMP 1195064OKJZ TRUCKING LLCNov 7, 2024Nov 7, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 12, 2026