TruckCodex

393.83H — Exhaust - Not securely fastened to the vehicle

FMCSA violation code under Vehicle Maintenance. 1,848 events recorded in roadside inspections. Severity weight: N/A.

Severity Weight
N/A
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
1,848
Code
393.83H
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
N/A
Violation Group
—
Total Events
1,848
Carriers Cited
1,583

Violation Description

Exhaust - Not securely fastened to the vehicle

About This Violation Code

Code 393.83H falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS).

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 393.83H in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
1,848
OOS Events
22
OOS Rate
1.2%
Top State (180d)
California
163 events

Top Enforcing States

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

1.California
163
OOS 2.5%
2.Texas
97
OOS 0.0%
3.US
82
OOS 0.0%
4.Pennsylvania
17
OOS 0.0%
5.New York
17
OOS 0.0%
6.Georgia
14
OOS 0.0%
7.New Jersey
14
OOS 0.0%
8.South Dakota
11
OOS 0.0%
9.Massachusetts
10
OOS 0.0%
10.Colorado
9
OOS 0.0%
11.Hawaii
8
OOS 0.0%
12.Ohio
8
OOS 0.0%
13.Washington
7
OOS 0.0%
14.Minnesota
6
OOS 0.0%
15.Connecticut
6
OOS 0.0%

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

Citation Trend (12 months)

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

55
Apr
110
May
93
Jun
117
Jul
128
Aug
121
Sep
107
Oct
110
Nov
68
Dec
115
Jan
97
Feb
96
Mar
2
Apr

Most Active Stations

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

1.LAREDO TX
45
OOS 0.0%
2.VETERANS POE
33
OOS 0.0%
3.OTAY MESA IF
29
OOS 3.4%
4.EL PASO TX
25
OOS 0.0%
5.CALEXICO IF
11
OOS 0.0%
6.TILFORD SD
10
OOS 0.0%
7.NJ
9
OOS 0.0%
8.MONUMENT CO
7
OOS 0.0%
9.COTTONWOOD IF
7
OOS 0.0%
10.MOUNTAIN PASS CVEF
7
OOS 28.6%

Often Cited Together

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

393.960 co-occurrences396.5B-L54 co-occurrences393.47E52 co-occurrences391.11B2-Z43 co-occurrences393.60C31 co-occurrences393.83G28 co-occurrences393.75A3-TAOL24 co-occurrences393.7824 co-occurrences396.17C-PI23 co-occurrences393.1122 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 1,583 carriers total • Page 1 of 64

Top Carriers with 393.83H Violations

Showing 25 of 1,583

fmcsa-violations
Top Carriers with 393.83H Violations
#CarrierUSDOT# Violations
#1FIRST STUDENT INC35440611
#2NEW JERSEY TRANSIT CORPORATION7429310
#3SAN DIEGO UNIFIED SCHOOL DISTRICT28085609
#4DURHAM SCHOOL SERVICES LP3506517
#5FEDERAL EXPRESS CORPORATION868766
#6RENE QUIROZ RUBIO36909426
#7SANTA BARBARA TRANSPORTATION CORP6777136
#8VRP TRANSPORTES DE MEXICO S DE RL DE CV6620586
#9AUTOTRANSPORTES ROMEDU SA DE CV11482595
#10TRANSPORTATION AND CARGO SOLUTIONS S DE RL DE CV7799735
#11QUICK TRANSIT MANAGEMENT AGENCY LLC17130034
#12HECTOR FRANCO ADRIANA PEREZ7606794
#13JOSE LUIS DELGADO CASTILLO10647574
#14CROWN XPRESS TRANSPORT INC10990854
#15ERRANDS PLUS INC14246554
#16LOS ANGELES COUNTY METROPOLITAN TRANSPORTATION AUTHORITY28496364
#17RODRIGUEZ EXPRESS SA DE CV6899054
#18COMMUNITY ACTION AGENCY OF COLUMBIANA COUNTY INC33838524
#19CELEDONIO CASTILLO BENAVIDES20308334
#20EAST VALLEY ADULT DAY HEALTH CARE CENTER INC26660784
#21EDNA ERIKA ALCARAZ LOPEZ22700473
#22D&R RIDES LLC14991763
#23AMIN TRANSIT LLC28744363
#24AUTOLINEAS SIGIFREDO GARCIA PALACIOS SA DE CV10860053
#25JULIO CESAR CIENFUEGOS GARZA23895663

Recent Inspections

Latest inspections where 393.83H was cited • 1,848 total events • Page 1 of 74

Recent Inspections with 393.83H

Showing 25 of 1,848

fmcsa-inspections
Recent Inspections with 393.83H
DateReport #StateLevelOOS
Apr 2, 202687488641CALevel 2No
Apr 1, 202687476348HILevel 1No
Mar 31, 202687474962GALevel 2No
Mar 31, 202687471280CALevel 1No
Mar 28, 202687449805NJLevel 1No
Mar 28, 202687447543GALevel 2No
Mar 27, 202687455854WALevel 2No
Mar 27, 202687488592CALevel 1Yes
Mar 27, 202687443772CALevel 1No
Mar 27, 202687468673TXLevel 1No
Mar 27, 202687466919TXLevel 2No
Mar 26, 202687426477COLevel 1No
Mar 26, 202687400370CTLevel 1No
Mar 26, 202687417713USLevel 1No
Mar 26, 202687411241CALevel 2No
Mar 26, 202687443073TXLevel 1No
Mar 25, 202687404729USLevel 1No
Mar 25, 202687442638TXLevel 1No
Mar 25, 202687442685TXLevel 1No
Mar 25, 202687449483NJLevel 1No
Mar 24, 202687466110TXLevel 2No
Mar 24, 202687398849CALevel 1No
Mar 24, 202687399760CALevel 5No
Mar 24, 202687380991USLevel 1No
Mar 24, 202687466167TXLevel 2No

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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