TruckCodex

393.83A — Exhaust system location defective

FMCSA violation code under Vehicle Maintenance. 416 events recorded in roadside inspections. Severity weight: 5.

Severity Weight
5
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
416
Code
393.83A
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
5
Violation Group
—
Total Events
416
Carriers Cited
371

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 393.83A 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 393.83A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
416
OOS Events
363
OOS Rate
87.3%
Top State (180d)
Texas
49 events

Top Enforcing States

Where 393.83A is most commonly cited (last 180 days)

1.Texas
49
OOS 83.7%
2.US
25
OOS 100.0%
3.Utah
6
OOS 100.0%
4.California
6
OOS 100.0%
5.North Carolina
3
OOS 66.7%
6.Florida
2
OOS 100.0%
7.South Dakota
2
OOS 100.0%
8.Pennsylvania
2
OOS 0.0%
9.Maryland
2
OOS 100.0%
10.New York
2
OOS 100.0%
11.Washington
2
OOS 100.0%
12.Alabama
2
OOS 100.0%
13.Missouri
2
OOS 100.0%
14.Arizona
2
OOS 100.0%
15.Wisconsin
1
OOS 100.0%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 393.83A citations. Red bars mark months with OOS-triggering citations.

12
Apr
26
May
22
Jun
30
Jul
28
Aug
24
Sep
23
Oct
11
Nov
19
Dec
21
Jan
31
Feb
28
Mar
1
Apr

Most Active Stations

Inspection stations citing 393.83A most often (last 180 days)

1.EL PASO TX
17
OOS 100.0%
2.VETERANS POE
13
OOS 100.0%
3.INDIOS POE
10
OOS 80.0%
4.COLUMBIA POE
4
OOS 100.0%
5.LAREDO TX
4
OOS 100.0%
6.YSLETA POE
2
OOS 0.0%
7.MOUNTAIN PASS CVEF
2
OOS 100.0%
8.0V TX480 LOOP
2
OOS 100.0%
9.CAMINO REAL POE
2
OOS 100.0%
10.PHARR POE
2
OOS 50.0%

Often Cited Together

Other violations commonly found on the same inspection (last 90 days)

393.47E21 co-occurrences391.11B2-Z19 co-occurrences396.5B-L17 co-occurrences393.917 co-occurrences393.83G13 co-occurrences393.78A-WS12 co-occurrences393.45B2UV11 co-occurrences396.3A111 co-occurrences393.7810 co-occurrences396.17C-PI10 co-occurrences

Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).

Top Carriers Cited

Ranked by frequency • 371 carriers total • Page 1 of 15

Top Carriers with 393.83A Violations

Showing 25 of 371

fmcsa-violations
Top Carriers with 393.83A Violations
#CarrierUSDOT# Violations
#1JORGE ANTONIO SEPULVEDA24727395
#2TRANSPORTES DE CARGA SAUL SALINAS SA DE CV5576764
#3OPERADORA DE TRANSPORTE INTERNACIONAL SA DE CV6834284
#4TRANSPORTADORA NORTE DE CHIHUAHUA S A DE C V7111254
#5TRANSPORTES DE MAQUILAS DE CD JUAREZ SA DE CV7103833
#6TRANSPORTES NARI SA DE CV31301073
#7SERVICIO INTERNACIONAL DE LOGISTICA Y TRANSPORTE SA DE CV6899293
#8SERVICIOS DE LOGISTICA TRANSNACIONAL EN TRANSPORTACION SA DE CV23809113
#9AUTOTRANSPORTE CA-RI SA DE CV17592463
#10LUIS MIGUEL JASSO LARA31515333
#11AUTOTRANSPORTES ROMEDU SA DE CV11482593
#12INTEGRATED INTERNATIONAL INC13736282
#13JIMENEZ LOGISTICS LLC40115672
#14FERROSRB SA DE CV40274192
#15SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV8181752
#16RGX TRANSPORTE DE CARGA INTERNACIONAL SA DE CV12076782
#17ROLANDO VILLANUEVA NAVARRO5591512
#18JOEL ROBLES VALDEZ37896172
#19ABDON RESENDEZ MIRELES37750232
#20WARDS RECYCLING LLC15768072
#21CONEXIONES INTERNACIONALES DEL BAJIO EN LOGISTICA S A DE C V36491312
#22RUBEN CARLOS TREVINO SANCHEZ16496892
#23FLORENTINO AGUIRRE HERRERA15986572
#24GERARDO AGUILAR GARCIA15821052
#25SERVICIOS RAPIDOS TREBOL SA DE CV8255352

Recent Inspections

Latest inspections where 393.83A was cited • 416 total events • Page 1 of 17

Recent Inspections with 393.83A

Showing 25 of 416

fmcsa-inspections
Recent Inspections with 393.83A
DateReport #StateLevelOOS
Apr 1, 202687476203USLevel 1Yes
Mar 31, 202687479755TXLevel 1Yes
Mar 31, 202687457051UTLevel 2Yes
Mar 31, 202687473348FLLevel 2Yes
Mar 31, 202687451573UTLevel 2Yes
Mar 26, 202687416901USLevel 1Yes
Mar 26, 202687421142MILevel 5Yes
Mar 24, 202687396015OKLevel 1Yes
Mar 24, 202687430678WALevel 2Yes
Mar 23, 202687396940TXLevel 1Yes
Mar 20, 202687435393NHLevel 1Yes
Mar 19, 202687403254MNLevel 1Yes
Mar 18, 202687334054TXLevel 1Yes
Mar 18, 202687334908CALevel 1Yes
Mar 13, 202687300139USLevel 1Yes
Mar 12, 202687324603TXLevel 1Yes
Mar 9, 202687252190ILLevel 1No
Mar 9, 202687248935MOLevel 1Yes
Mar 8, 202687240339MOLevel 2Yes
Mar 5, 202687314368TXLevel 2Yes
Mar 5, 202687248820USLevel 1Yes
Mar 5, 202687227126TXLevel 2Yes
Mar 4, 202687236234MDLevel 1Yes
Mar 4, 202687252816TXLevel 1Yes
Mar 4, 202687212669USLevel 1Yes

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Unknown freshness
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
FMCSR violation codes by BASIC category
ReferenceFMCSA Roadside Inspections
Inspection levels and procedures
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