Equipment unit · VIN-decoded · NHTSA vPIC

2022 Western Star 4900

5KJNALD18NPMW9880 · Truck-Tractor · TRUCK
Carriers run under2
33 mo
Inspections17
all-time
OOS inspections0
of 17
First seenOct 11, 2023
CA
Last seenJul 29, 2026
CO
Inspected under 2 different carriers in 33 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
5KJNALD18NPMW9880
Make
Western Star
Model
4900
Model year
2022
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 14, 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
5KJ

Deterministic · VIN positions 1–3.

Vehicle descriptor section
NALD1

Deterministic · VIN positions 4–8.

Check digit
8 · valid

Deterministic · position 9; calculated value 8.

Model year candidates
1992 or 2022

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

North American serial sequence
MW9880

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
WESTERN STAR

Prefix basis · 56 decoded VINs at 100.0% prefix purity.

Model
4900

Prefix basis · 56 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
2022

Observed directly for this VIN via NHTSA vPIC.

Observed make
WESTERN STAR

Observed directly for this VIN via NHTSA vPIC.

Observed model
4900

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck-Tractor

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRUCK

Observed directly for this VIN via NHTSA vPIC.

GVWR
Class 8: 33,001 lb and above (14,969 kg and above)

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 · Oct 11, 2023 – Jul 29, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 29, 2026COIII · Driver-only2MONARCH HEAVY HAUL CORP 2943108ZP65647/CA
Jun 11, 2026AZIII · Driver-only0MONARCH HEAVY HAUL CORP 2943108ZP65647/AZ
May 19, 2026AZIII · Driver-only0MONARCH HEAVY HAUL CORP 2943108ZP65647/CA
May 18, 2026AZIII · Driver-only0MONARCH HEAVY HAUL CORP 2943108ZP65647/CA
Apr 17, 2026CAI · Full0MONARCH HEAVY HAUL CORP 2943108ZP65647/CA
Feb 10, 2026CAII · Walk-around1MONARCH HEAVY HAUL CORP 2943108ZP75507/CA
Oct 15, 2025AZIII · Driver-only0MONARCH HEAVY HAUL CORP 2943108ZP75507/CA
Sep 12, 2025CAI · Full0MONARCH HEAVY HAUL CORP 2943108ZP75507/CA
Dec 19, 2024AZIII · Driver-only0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Dec 18, 2024AZII · Walk-around0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Nov 22, 2024AZII · Walk-around1SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Nov 21, 2024AZIII · Driver-only0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Jan 4, 2024AZII · Walk-around0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Jan 3, 2024AZIII · Driver-only0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Oct 17, 2023AZII · Walk-around0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Oct 16, 2023AZII · Walk-around0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
Oct 11, 2023CAI · Full0SAMUEL J PIAZZA & SON INC 391314YP01758/CA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
MONARCH HEAVY HAUL CORP2943108Sep 12, 2025Jul 29, 20268CA
SAMUEL J PIAZZA & SON INC391314Oct 11, 2023Dec 19, 20249CA
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.
ZP65647CA1MONARCH HEAVY HAUL CORPApr 17, 2026Jul 29, 20264
ZP65647AZMONARCH HEAVY HAUL CORPJun 11, 2026Jun 11, 20261
ZP75507CAMONARCH HEAVY HAUL CORPSep 12, 2025Feb 10, 20263
YP01758CASAMUEL J PIAZZA & SON INCOct 11, 2023Dec 19, 20249
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 14, 2026