Equipment unit · VIN-decoded · NHTSA vPIC

4U3J04834ML020580

Not yet decoded
Carriers run under2
3 mo
Inspections2
all-time
OOS inspections1
of 2
First seenApr 14, 2026
CA
Last seenJul 23, 2026
CA
Inspected under 2 different carriers in 3 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

This VIN has not been decoded yet — the unit's carrier, inspection and plate history below is reconstructed from the FMCSA inspection feed regardless.

Decode evidence & sources

Deterministic structure

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

World manufacturer identifier
4U3

Deterministic · VIN positions 1–3.

Vehicle descriptor section
J0483

Deterministic · VIN positions 4–8.

Check digit
4 · valid

Deterministic · position 9; calculated value 4.

Model year candidates
1991 or 2021

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

North American serial sequence
020580

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
X-L SPECIALIZED TRAILERS INC

Prefix basis · 5 decoded VINs at 100.0% prefix purity.

Model
X-L SPECIALIZED TRAILERS INC

Prefix basis · 5 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.

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 · Apr 14, 2026 – Jul 23, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 23, 2026CAIII · Driver-only4RELIABLE TRANSPORT SYSTEMS INC 36174204TP2599/CA
Apr 14, 2026CAII · Walk-around1OOSALLIANCE SPECIALIZED INC 21658424TP2599/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
RELIABLE TRANSPORT SYSTEMS INC3617420Jul 23, 2026Jul 23, 20261CA
ALLIANCE SPECIALIZED INC2165842Apr 14, 2026Apr 14, 20261CA
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.
4TP2599CA2RELIABLE TRANSPORT SYSTEMS INCJul 23, 2026Jul 23, 20261
4TP2599CAALLIANCE SPECIALIZED INCApr 14, 2026Apr 14, 20261
Sources: FMCSA SAFER · L&I · NHTSA vPIC