Equipment unit · VIN-decoded · NHTSA vPIC

2021 Carmex

3A9DM4837MG019663 · TRAILER
Carriers run under1
16 mo
Inspections5
all-time
OOS inspections0
of 5
First seenJan 23, 2024
TX
Last seenMay 26, 2025
TX
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
3A9DM4837MG019663
Make
Carmex
Model
Not decoded
Model year
2021
Body class
Not decoded
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 4, 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
3A9

Deterministic · VIN positions 1–3.

Vehicle descriptor section
DM483

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
019663

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
CARMEX

Observed directly for this VIN via NHTSA vPIC.

Observed model
Not established

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Not established

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

  • 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 · Jan 23, 2024 – May 26, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
May 26, 2025TXII · Walk-around1PETROLIFICOS DE MONTERREY SA DE CV 391046493UG1A/MX
Dec 3, 2024TXII · Walk-around0PETROLIFICOS DE MONTERREY SA DE CV 391046493UG1A/MX
Oct 29, 2024TXII · Walk-around3PETROLIFICOS DE MONTERREY SA DE CV 391046493UG1A/MX
Oct 23, 2024TXI · Full1PETROLIFICOS DE MONTERREY SA DE CV 391046493UG1A/MX
Jan 23, 2024TXI · Full3PETROLIFICOS DE MONTERREY SA DE CV 391046493UG1A/MX
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
PETROLIFICOS DE MONTERREY SA DE CV3910464Jan 23, 2024May 26, 20255TA
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.
93UG1AMX2PETROLIFICOS DE MONTERREY SA DE CVJan 23, 2024May 26, 20255
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 4, 2026