Equipment unit · VIN-decoded · NHTSA vPIC

1997 Peterbilt 379

1XP5DB9X7VN433359 · Truck-Tractor · TRUCK
Carriers run under2
27 mo
Inspections4
all-time
OOS inspections1
of 4
First seenJan 1, 2024
OH
Last seenApr 3, 2026
NJ
Inspected under 2 different carriers in 27 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
1XP5DB9X7VN433359
Make
Peterbilt
Model
379
Model year
1997
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 12, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
02

Inspection history

Every roadside inspection of this VIN, newest first · Jan 1, 2024 – Apr 3, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Apr 3, 2026NJII · Walk-around0—DENNIS DIEFENDERFER RODNEY DIEFENDERFER AND JOSEPH DIEFENDERFER 853580AH44150/PA
Dec 3, 2025WIII · Walk-around2—TRIPLE M EXPRESS INC 2579311AH44150/PA
May 1, 2025PAII · Walk-around10OOSTRIPLE M EXPRESS INC 2579311AH44150/PA
Jan 1, 2024OHIII · Driver-only0—TRIPLE M EXPRESS INC 2579311AH44150/PA
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
DENNIS DIEFENDERFER RODNEY DIEFENDERFER AND JOSEPH DIEFENDERFER853580Apr 3, 2026Apr 3, 20261PA
TRIPLE M EXPRESS INC2579311Jan 1, 2024Dec 3, 20253NJ
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.
AH44150PA—DENNIS DIEFENDERFER RODNEY DIEFENDERFER AND JOSEPH DIEFENDERFERApr 3, 2026 → Apr 3, 20261
AH44150PA—TRIPLE M EXPRESS INCJan 1, 2024 → Dec 3, 20253
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 12, 2026