Equipment unit · VIN-decoded · NHTSA vPIC

2018 Polar Tank Trailer

3H6S34326J7049582 · TRAILER
Carriers run under2
17 mo
Inspections5
all-time
OOS inspections2
of 5
First seenFeb 6, 2024
CA
Last seenJul 24, 2025
CA
Inspected under 2 different carriers in 17 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
3H6S34326J7049582
Make
Polar Tank Trailer
Model
Not decoded
Model year
2018
Body class
Not decoded
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Aug 7, 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
S3432

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1988 or 2018

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

North American serial sequence
049582

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 · 10 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 10 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
2018

Observed directly for this VIN via NHTSA vPIC.

Observed make
POLAR TANK TRAILER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Not established

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 · Feb 6, 2024 – Jul 24, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 24, 2025CAII · Walk-around0MSJ TRUCKING LLC 42766722584597/ME
Mar 20, 2025CAI · Full1OOSSTACEY WITTLER 7078642584597/ME
Jul 30, 2024CAI · Full1STACEY WITTLER 7078642584597/ME
Apr 30, 2024CAI · Full1OOSSTACEY WITTLER 7078642584597/ME
Feb 6, 2024CAIII · Driver-only2STACEY WITTLER 7078642584597/ME
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MSJ TRUCKING LLC4276672Jul 24, 2025Jul 24, 20251CA
STACEY WITTLER707864Feb 6, 2024Mar 20, 20254CA
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.
2584597MEMSJ TRUCKING LLCJul 24, 2025Jul 24, 20251
2584597MESTACEY WITTLERFeb 6, 2024Mar 20, 20254
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Aug 7, 2026