TruckCodex

393.55D2-B — Coupling device/towing methods defective

FMCSA violation code under Vehicle Maintenance. 15,737 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
15,737
Code
393.55D2-B
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
15,737
Carriers Cited
9,017

Violation Description

Coupling devices or towing methods on commercial motor vehicle are defective or inadequate.

About This Violation Code

Code 393.55D2-B falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 8 (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 393.55D2 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
15,737
OOS Events
0
OOS Rate
0.0%
Top State (180d)
US
1,083 events

Top Enforcing States

Where 393.55D2-B is most commonly cited (last 180 days)

1.US
1,083
OOS 0.0%
2.California
410
OOS 0.0%
3.New York
320
OOS 0.0%
4.Arizona
295
OOS 0.0%
5.Missouri
187
OOS 0.0%
6.Utah
153
OOS 0.0%
7.Washington
137
OOS 0.0%
8.Wisconsin
118
OOS 0.0%
9.Pennsylvania
112
OOS 0.0%
10.Ohio
95
OOS 0.0%
11.Virginia
66
OOS 0.0%
12.Connecticut
61
OOS 0.0%
13.South Dakota
55
OOS 0.0%
14.Colorado
55
OOS 0.0%
15.South Carolina
50
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 393.55D2-B citations. Red bars mark months with OOS-triggering citations.

419
Apr
981
May
815
Jun
888
Jul
859
Aug
750
Sep
789
Oct
634
Nov
640
Dec
664
Jan
625
Feb
678
Mar
42
Apr

Most Active Stations

Inspection stations citing 393.55D2-B most often (last 180 days)

1.LAREDO TX
551
OOS 0.0%
2.BROWNSVILLE TX
147
OOS 0.0%
3.MAYVIEW MO
125
OOS 0.0%
4.NOGALES AZ
114
OOS 0.0%
5.CASTAIC IF
83
OOS 0.0%
6.EL PASO TX
80
OOS 0.0%
7.SAN SIMON AZ
58
OOS 0.0%
8.NOGALES AZ
51
OOS 0.0%
9.SISSETON SD
49
OOS 0.0%
10.SAN LUIS AZ
49
OOS 0.0%

Often Cited Together

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

393.55E-B627 co-occurrences393.47E342 co-occurrences393.45B2-B-AIR267 co-occurrences391.11B2-Z248 co-occurrences396.5B-L234 co-occurrences393.53B-B226 co-occurrences396.17C-PI224 co-occurrences393.45D-B214 co-occurrences393.75C-TAOTD-LT2/32179 co-occurrences393.75A3-TAOL165 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 9,017 carriers total • Page 1 of 361

Top Carriers with 393.55D2-B Violations

Showing 25 of 9,017

fmcsa-violations
Top Carriers with 393.55D2-B Violations
#CarrierUSDOT# Violations
#1AUTOTRANSPORTES ROMEDU SA DE CV1148259124
#2TRANSPORTES DE CARGA FEMA SA DE CV117501893
#3TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V104190785
#4LIPSA TRANSPORTES SA DE CV258414469
#5INTER MEXICANA DE TRANSPORTE SA DE CV171641566
#6AUTOTRANSPORTES FRONTERIZOS MG SA DE CV177053456
#7TRANSPORTES ORCIS SA DE CV182560950
#8JESUS PEDRO PEREZ CARRILLO115985150
#9FERNANDEZ LOGISTICS SA DE C V94302149
#10RS TRANSFER SA DE CV115682548
#11AUTO EXPRESS SALDIVAR SA DE CV65353546
#12JULIO CESAR CIENFUEGOS GARZA238956644
#13AKNA TRANSPORTES S DE RL DE CV185679642
#14JUAN PABLO GARCIA CHAVEZ217085640
#15KORAIMA EVELYN GRIJALVA DE LA ROSA374793440
#16TSM CONNECT SA DE CV213415540
#17ROYAL TRANSPORTS SA DE CV68213537
#18COMERCIALIZADORA MARSER SA DE CV293422837
#19CORPORACION CLC SOLUTIONS S DE RL DE CV213851536
#20WESTERN EXPRESS INC51141236
#21SBC TRANSFER SA DE CV304603735
#22FLETES MEXICO CHIHUAHUA SA DE CV105311835
#23GALA-SCL SA DE CV113378433
#24OMAR CANDELARIO HERNANDEZ BUENO204952532
#25SAMA FREIGTH S DE RL DE CV372028731

Recent Inspections

Latest inspections where 393.55D2-B was cited • 15,737 total events • Page 1 of 630

Recent Inspections with 393.55D2-B

Showing 25 of 15,737

fmcsa-inspections
Recent Inspections with 393.55D2-B
DateReport #StateLevelOOS
Apr 3, 202687484890USLevel 1No
Apr 3, 202687485250USLevel 1No
Apr 2, 202687484842USLevel 1No
Apr 2, 202687489533CALevel 2No
Apr 2, 202687489524CALevel 2No
Apr 2, 202687484923VALevel 1No
Apr 2, 202687485331MOLevel 1No
Apr 2, 202687484749USLevel 1No
Apr 2, 202687484838USLevel 1No
Apr 2, 202687484225PALevel 2No
Apr 2, 202687480712CALevel 2No
Apr 2, 202687471536CTLevel 2No
Apr 2, 202687485084USLevel 1No
Apr 2, 202687485115USLevel 1No
Apr 2, 202687483883MOLevel 1No
Apr 2, 202687485432ARLevel 2No
Apr 2, 202687485114USLevel 1No
Apr 1, 202687458686ORLevel 2No
Apr 1, 202687474595MOLevel 1No
Apr 1, 202687459155USLevel 1No
Apr 1, 202687474768USLevel 1No
Apr 1, 202687458151SDLevel 2No
Apr 1, 202687485092USLevel 1No
Apr 1, 202687475043USLevel 1No
Apr 1, 202687474532MOLevel 1No

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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