Equipment unit · VIN-decoded · NHTSA vPIC

2021 Western Star 4700

5KKZAXFM6MPMR2780 · Truck · INCOMPLETE VEHICLE
Carriers run under2
28 mo
Inspections5
all-time
OOS inspections1
of 5
First seenDec 27, 2023
AZ
Last seenApr 2, 2026
AZ
Inspected under 2 different carriers in 28 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
5KKZAXFM6MPMR2780
Make
Western Star
Model
4700
Model year
2021
Body class
Truck
Vehicle type
INCOMPLETE VEHICLE
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 5, 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
5KK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
ZAXFM

Deterministic · VIN positions 4–8.

Check digit
6 · valid

Deterministic · position 9; calculated value 6.

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
MR2780

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.

Not established

No supported platform claim is established for this prefix

The resolver answered successfully but returned no row above the evidence floor. This does not mean the vehicle has no platform or that no data exists; it means this store cannot make the claim.

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
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
WESTERN STAR

Observed directly for this VIN via NHTSA vPIC.

Observed model
4700

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
INCOMPLETE VEHICLE

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

  • platform make
  • platform model
  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Dec 27, 2023 – Apr 2, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 2, 2026AZII · Walk-around5OOS7-4 USA TRUCKING LLC 439523112W6263/AZ
Mar 30, 2026AZII · Walk-around17-4 USA TRUCKING LLC 43952311YA4SB/AZ
Nov 11, 2025AZII · Walk-around07-4 USA TRUCKING LLC 43952311YA4SB/AZ
Aug 22, 2024AZIII · Driver-only0MOUNTAIN WEST LOGISTICS LLC 29369721YA4SB/AZ
Dec 27, 2023AZIII · Driver-only0MOUNTAIN WEST LOGISTICS LLC 29369721YA4SB/AZ
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
7-4 USA TRUCKING LLC4395231Nov 11, 2025Apr 2, 20263AZ
MOUNTAIN WEST LOGISTICS LLC2936972Dec 27, 2023Aug 22, 20242AZ
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.
12W6263AZ7-4 USA TRUCKING LLCApr 2, 2026Apr 2, 20261
1YA4SBAZ7-4 USA TRUCKING LLCNov 11, 2025Mar 30, 20262
1YA4SBAZMOUNTAIN WEST LOGISTICS LLCDec 27, 2023Aug 22, 20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 5, 2026