Equipment unit · VIN-decoded · NHTSA vPIC

2024 Kenworth W9 Series

1XKWP40X9RR351805 · Truck-Tractor · TRUCK
W900
Carriers run under2
20 mo
Inspections4
all-time
OOS inspections2
of 4
First seenSep 15, 2024
MT
Last seenMay 14, 2026
CA
Inspected under 2 different carriers in 20 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
1XKWP40X9RR351805
Make
Kenworth
Model
W9 Series
Model year
2024
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 10, 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
1XK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
WP40X

Deterministic · VIN positions 4–8.

Check digit
9 · valid

Deterministic · position 9; calculated value 9.

Model year candidates
1994 or 2024

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

North American serial sequence
351805

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
KENWORTH

Prefix basis · 131 decoded VINs at 100.0% prefix purity.

Model
W9 Series

Prefix basis · 131 decoded VINs at 100.0% prefix purity.

Model line
W900

Sourced label · prefix basis 131 decoded VINs at 100.0% prefix purity.

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
2024

Observed directly for this VIN via NHTSA vPIC.

Observed make
KENWORTH

Observed directly for this VIN via NHTSA vPIC.

Observed model
W9 Series

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

  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Sep 15, 2024 – May 14, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 14, 2026CAII · Walk-around1OOSSPENCER B STELLY 833112AM2355/ID
Dec 1, 2025CAIII · Driver-only1SPENCER B STELLY 833112AM2355/ID
May 15, 2025ORIII · Driver-only2OOSWALKER TRUCKING LLC 1126863A061876UT/UT
Sep 15, 2024MTIII · Driver-only1WALKER TRUCKING LLC 1126863A061876/UT
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
SPENCER B STELLY833112Dec 1, 2025May 14, 20262ID
WALKER TRUCKING LLC1126863Sep 15, 2024May 15, 20252UT
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.
AM2355IDSPENCER B STELLYDec 1, 2025May 14, 20262
A061876UTUTWALKER TRUCKING LLCMay 15, 2025May 15, 20251
A061876UTWALKER TRUCKING LLCSep 15, 2024Sep 15, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 10, 2026