TruckCodex

393.83(a) — Exhaust system location defective

FMCSA violation code under Vehicle Maintenance. 511 events recorded in roadside inspections. Severity weight: 5.

Severity Weight
5
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
511
Code
393.83(a)
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
5
Violation Group
BASIC 5
Total Events
511
Carriers Cited
474

Violation Description

Exhaust system on CMV is not located so as to prevent burning, charring, or damaging the electrical wiring, fuel supply, or any combustible part.

About This Violation Code

Code 393.83(a) falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 5 (scale 1-10, higher = more severe).

When this violation is cited during a roadside inspection, it contributes to the carrier's Vehicle Maintenance BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.

Regulatory Reference

Federal Motor Carrier Safety Regulations

This violation references 49 CFR 393.83 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
511
OOS Events
261
OOS Rate
51.1%
Top State (180d)
—

Top Carriers Cited

Ranked by frequency • 474 carriers total • Page 1 of 19

Top Carriers with 393.83(a) Violations

Showing 25 of 474

fmcsa-violations
Top Carriers with 393.83(a) Violations
#CarrierUSDOT# Violations
#1JORGE L TRIANA18836084
#2FLETES MARSA INTERNACIONAL SA DE CV6660903
#3FRIENDLY HARBOR SERVICES INC17391883
#4SERVICIOS DE LOGISTICA TRANSNACIONAL EN TRANSPORTACION SA DE CV23809113
#5EMPLOYMENT DEVELOPMENT INC30625582
#6JOSE VALDEZ GUERRERO17763282
#7TRIPLE RRR CARRIERS INC30313642
#8AUTOTRANSPORTES FRONTERIZOS MG SA DE CV17705342
#9NO LIMITS LOGISTICS LLC34600552
#10RYNDERS TRANSPORT LLC36093202
#11LIFEWISE ACADEMY LLC41169962
#12EDUARDO RODRIGUEZ GONZALEZ15033532
#13WILLIAM EDWARD MAKI4327712
#14MATTMILLER LANDWORKS LLC40616642
#15BIG GRAMPAW TRUCKING LLC38801112
#16JUSTIN BLECK TRUCKING LLC33542342
#17ANTONIO KARY40905882
#18RAFAEL ALVAREZ CHAVEZ37791682
#19WAGNER EXPRESS LLC35573152
#20COMMUNITY ACTION AGENCY OF COLUMBIANA COUNTY INC33838522
#21LITTLE BROTHERS TRANSPORT LLC37740522
#22JULIO CESAR LERMA GONZALEZ24415592
#23ROLANDO VILLANUEVA NAVARRO5591512
#24TRANSPORTES DE MAQUILAS DE CD JUAREZ SA DE CV7103832
#25D LINDNER TRUCKING LLC33511622

Recent Inspections

Latest inspections where 393.83(a) was cited • 511 total events • Page 1 of 21

Recent Inspections with 393.83(a)

Showing 25 of 511

fmcsa-inspections
Recent Inspections with 393.83(a)
DateReport #StateLevelOOS
Oct 14, 202482910927KSLevel 1Yes
Oct 11, 202482897343USLevel 1Yes
Oct 8, 202482885918USLevel 1Yes
Oct 7, 202482881116TXLevel 1Yes
Oct 7, 202482900349TXLevel 2Yes
Oct 4, 202482844398UTLevel 1Yes
Oct 3, 202482881391TXLevel 2Yes
Oct 2, 202482828093TXLevel 1No
Sep 30, 202482789319UTLevel 1Yes
Sep 29, 202482792638MSLevel 2Yes
Sep 27, 202482796212TXLevel 2Yes
Sep 27, 202482849863TXLevel 2Yes
Sep 26, 202482827521TXLevel 2No
Sep 26, 202482764013USLevel 1Yes
Sep 20, 202482770697CALevel 1No
Sep 18, 202482703913KYLevel 1No
Sep 18, 202482753993USLevel 1Yes
Sep 13, 202482671367OHLevel 5Yes
Sep 12, 202482651309USLevel 1Yes
Sep 6, 202482597117KSLevel 1Yes
Sep 6, 202482649548AZLevel 2Yes
Sep 5, 202482612639TXLevel 1Yes
Sep 5, 202482584798KYLevel 1No
Sep 3, 202482568139USLevel 2Yes
Aug 29, 202482533757UTLevel 1Yes

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Updated 3 months ago
Federal Motor Carrier Safety Regulations (49 CFR)
Unknown freshness

Related records

CategoryAll Vehicle Maintenance Violations
Browse all violation codes in the Vehicle Maintenance BASIC
IndexAll Violation Codes
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ReferenceFMCSA Roadside Inspections
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