Equipment unit · VIN-decoded · NHTSA vPIC

2018 Kenworth W9 Series

1XKWD40X4JJ180229 · Truck-Tractor · TRUCK
W900
Carriers run under1
19 mo
Inspections3
all-time
OOS inspections1
of 3
First seenAug 8, 2023
MA
Last seenMar 14, 2025
MA
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1XKWD40X4JJ180229
Make
Kenworth
Model
W9 Series
Model year
2018
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
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
1XK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
WD40X

Deterministic · VIN positions 4–8.

Check digit
4 · valid

Deterministic · position 9; calculated value 4.

Model year candidates
1988 or 2018

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

North American serial sequence
180229

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 · 1,108 decoded VINs at 99.0% prefix purity.

Model
W9 Series

Prefix basis · 1,108 decoded VINs at 99.0% prefix purity.

Model line
W900

Sourced label · prefix basis 1,108 decoded VINs at 99.0% 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
2018

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 · Aug 8, 2023 – Mar 14, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 14, 2025MAIII · Driver-only1C NAUGHTON CORP 19619997537B/MA
Dec 19, 2024MAII · Walk-around4OOSC NAUGHTON CORP 19619997537B/MA
Aug 8, 2023MAIII · Driver-only0C NAUGHTON CORP 19619997537B/MA
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
C NAUGHTON CORP1961999Aug 8, 2023Mar 14, 20253MA
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.
7537BMAC NAUGHTON CORPAug 8, 2023Mar 14, 20253
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 26, 2026