Equipment unit · VIN-decoded · NHTSA vPIC

2022 Monroe Towmaster

4KNBF2323NL162072 · Trailer · TRAILER
Carriers run under1
28 mo
Inspections6
all-time
OOS inspections3
of 6
First seenMar 12, 2024
MD
Last seenJul 1, 2026
NJ
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
4KNBF2323NL162072
Make
Monroe Towmaster
Model
Monroe Towmaster
Model year
2022
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 30, 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
4KN

Deterministic · VIN positions 1–3.

Vehicle descriptor section
BF232

Deterministic · VIN positions 4–8.

Check digit
3 · valid

Deterministic · position 9; calculated value 3.

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
162072

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
MONROE TOWMASTER

Prefix basis · 10 decoded VINs at 100.0% prefix purity.

Model
Monroe Towmaster

Prefix basis · 10 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
MONROE TOWMASTER

Observed directly for this VIN via NHTSA vPIC.

Observed model
Monroe Towmaster

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

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 · Mar 12, 2024 – Jul 1, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 1, 2026NJI · Full7OOSLEN THE PLUMBER 1094755365532X/MD
May 14, 2026PAI · Full0LEN THE PLUMBER 1094755365532X/MD
Oct 7, 2025MDI · Full1LEN THE PLUMBER 1094755365532X/MD
Aug 21, 2025MDIII · Driver-only2OOSLEN THE PLUMBER 1094755365532X/MD
Apr 9, 2025MDIII · Driver-only1OOSLEN THE PLUMBER 1094755365532X/MD
Mar 12, 2024MDII · Walk-around0LEN THE PLUMBER 1094755365532X/MD
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
LEN THE PLUMBER1094755Mar 12, 2024Jul 1, 20266MD
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.
365532XMD2LEN THE PLUMBERMar 12, 2024Jul 1, 20266
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 30, 2026