Equipment unit · VIN-decoded · NHTSA vPIC

1998 Polar Tank Trailer

1PMA24326W5001289 · Trailer · TRAILER
Carriers run under2
14 mo
Inspections3
all-time
OOS inspections1
of 3
First seenFeb 7, 2025
CA
Last seenApr 3, 2026
CA
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
1PMA24326W5001289
Make
Polar Tank Trailer
Model
Polar Tank Trailer
Model year
1998
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 26, 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
1PM

Deterministic · VIN positions 1–3.

Vehicle descriptor section
A2432

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

Model year candidates
1998 or 2028

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

North American serial sequence
001289

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 · 237 decoded VINs at 100.0% prefix purity.

Model
Polar Tank Trailer

Prefix basis · 237 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
1998

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 · Feb 7, 2025 – Apr 3, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 3, 2026CAII · Walk-around2POTTS ENTERPRISES LLC 39780334UW3181/CA
Mar 5, 2026CAII · Walk-around2POTTS ENTERPRISES LLC 39780334UW3181/CA
Feb 7, 2025CAI · Full6OOSACE TANK LINES 33710164UW3181/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
POTTS ENTERPRISES LLC3978033Mar 5, 2026Apr 3, 20262CA
ACE TANK LINES3371016Feb 7, 2025Feb 7, 20251CA
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.
4UW3181CAPOTTS ENTERPRISES LLCMar 5, 2026Apr 3, 20262
4UW3181CAACE TANK LINESFeb 7, 2025Feb 7, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 26, 2026