Equipment unit · VIN-decoded · NHTSA vPIC

2021 Kenworth W9 Series

1NKWL40X7MR416827 · Truck · INCOMPLETE VEHICLE
W900
Carriers run under1
29 mo
Inspections6
all-time
OOS inspections0
of 6
First seenJul 5, 2023
DE
Last seenDec 12, 2025
DE
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1NKWL40X7MR416827
Make
Kenworth
Model
W9 Series
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
Jun 23, 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
1NK

Deterministic · VIN positions 1–3.

Vehicle descriptor section
WL40X

Deterministic · VIN positions 4–8.

Check digit
7 · valid

Deterministic · position 9; calculated value 7.

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
416827

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 · 193 decoded VINs at 98.5% prefix purity.

Model
W9 Series

Prefix basis · 193 decoded VINs at 98.5% prefix purity.

Model line
W900

Sourced label · prefix basis 193 decoded VINs at 98.5% 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.

Not established

  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jul 5, 2023 – Dec 12, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Dec 12, 2025DEIII · Driver-only0—STROBERT TREE SERVICES INC 1287979CL122011/DE
Dec 5, 2025PAIII · Driver-only1—STROBERT TREE SERVICES INC 1287979CL122011/DE
Sep 22, 2025PAIII · Driver-only0—STROBERT TREE SERVICES INC 1287979CL122011/DE
Jun 6, 2025DEII · Walk-around1—STROBERT TREE SERVICES INC 1287979CL122011/DE
Dec 3, 2024PAIII · Driver-only0—STROBERT TREE SERVICES INC 1287979CL122011/DE
Jul 5, 2023DEIII · Driver-only2—STROBERT TREE SERVICES INC 1287979CL122011/DE
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
STROBERT TREE SERVICES INC1287979Jul 5, 2023Dec 12, 20256DE
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.
CL122011DE—STROBERT TREE SERVICES INCJul 5, 2023 → Dec 12, 20256
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 23, 2026