TruckCodex

393.55D1-B — Coupling device/towing methods defective

FMCSA violation code under Vehicle Maintenance. 22,987 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
22,987
Code
393.55D1-B
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
22,987
Carriers Cited
12,010

Violation Description

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

About This Violation Code

Code 393.55D1-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 393.55D1 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
22,987
OOS Events
0
OOS Rate
0.0%
Top State (180d)
US
2,415 events

Top Enforcing States

Where 393.55D1-B is most commonly cited (last 180 days)

1.US
2,415
OOS 0.0%
2.New York
460
OOS 0.0%
3.California
381
OOS 0.0%
4.Florida
199
OOS 0.0%
5.Pennsylvania
199
OOS 0.0%
6.Arizona
193
OOS 0.0%
7.New Jersey
166
OOS 0.0%
8.Washington
140
OOS 0.0%
9.Missouri
137
OOS 0.0%
10.Virginia
108
OOS 0.0%
11.Wisconsin
98
OOS 0.0%
12.Utah
85
OOS 0.0%
13.Colorado
85
OOS 0.0%
14.Maryland
79
OOS 0.0%
15.Alabama
62
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 393.55D1-B citations. Red bars mark months with OOS-triggering citations.

475
Apr
1,110
May
1,072
Jun
1,142
Jul
1,114
Aug
1,136
Sep
1,110
Oct
940
Nov
956
Dec
978
Jan
943
Feb
1,114
Mar
58
Apr

Most Active Stations

Inspection stations citing 393.55D1-B most often (last 180 days)

1.LAREDO TX
1,104
OOS 0.0%
2.EL PASO TX
397
OOS 0.0%
3.BROWNSVILLE TX
266
OOS 0.0%
4.PHARR TX
147
OOS 0.0%
5.LOS INDIOS TX
97
OOS 0.0%
6.LIBERTY LAKE WA
95
OOS 0.0%
7.NJ
90
OOS 0.0%
8.MAYVIEW MO
85
OOS 0.0%
9.PROGRESO TX
84
OOS 0.0%
10.EAGLE PASS TX
80
OOS 0.0%

Often Cited Together

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

391.11B2-Z601 co-occurrences393.55E-B579 co-occurrences396.5B-L555 co-occurrences393.47E460 co-occurrences393.78A-WS377 co-occurrences393.53B-B324 co-occurrences393.45B2-B-AIR317 co-occurrences396.17C-PI313 co-occurrences393.45D-B304 co-occurrences393.75A3-TAOL289 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 12,010 carriers total • Page 1 of 481

Top Carriers with 393.55D1-B Violations

Showing 25 of 12,010

fmcsa-violations
Top Carriers with 393.55D1-B Violations
#CarrierUSDOT# Violations
#1VRP TRANSPORTES DE MEXICO S DE RL DE CV662058140
#2SERGIO VARELA MALDONADO725226103
#3LINEA AMERICA TRANSPORTE S DE RL DE CV324004383
#4GILBERTO CARRANZA-GOMEZ78684074
#5CNC LOGISTICS S DE RL DE CV272620374
#6RUBEN CARLOS TREVINO SANCHEZ164968973
#7BULLET TRANSPORT SERVICES MX S DE RL DE CV240309273
#8TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V104190769
#9INTER MEXICANA DE TRANSPORTE SA DE CV171641566
#10DYLKA DISTRIBUCIONES Y LOGISTIK SA DE CV251037259
#11EDUARDO RODRIGUEZ GONZALEZ150335355
#12HUGO EDUVILIO AYALA ORTEGA241502553
#13DANIEL ERNESTO PENA COTA164763953
#14JULIO CESAR CIENFUEGOS GARZA238956653
#15TSM CONNECT SA DE CV213415553
#16FLETES MARSA INTERNACIONAL SA DE CV66609052
#17OPERADORA DE TRANSPORTE INTERNACIONAL SA DE CV68342852
#18JUAN PABLO GARCIA CHAVEZ217085644
#19SERVICIOS RAPIDOS TREBOL SA DE CV82553543
#20TRANSPORTES AGUILA DE CIUDAD JUAREZ SA DE CV55536540
#21TRANSPORTE GREEN SOLUTIONS S DE RL DE CV282078240
#22KORAIMA EVELYN GRIJALVA DE LA ROSA374793439
#23TRANSPORTES DE CARGA FEMA SA DE CV117501839
#24MARTIN FRANCISCO CAMPOS PEREZ64336639
#25SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV81817538

Recent Inspections

Latest inspections where 393.55D1-B was cited • 22,987 total events • Page 1 of 920

Recent Inspections with 393.55D1-B

Showing 25 of 22,987

fmcsa-inspections
Recent Inspections with 393.55D1-B
DateReport #StateLevelOOS
Apr 3, 202687485036USLevel 1No
Apr 3, 202687484244ALLevel 2No
Apr 3, 202687488765CALevel 1No
Apr 3, 202687485085PALevel 2No
Apr 3, 202687485255USLevel 1No
Apr 3, 202687484854USLevel 2No
Apr 2, 202687484597USLevel 1No
Apr 2, 202687484866USLevel 1No
Apr 2, 202687484261MOLevel 1No
Apr 2, 202687485114USLevel 1No
Apr 2, 202687475777VALevel 1No
Apr 2, 202687480447CALevel 1No
Apr 2, 202687476273USLevel 1No
Apr 2, 202687488895CALevel 1No
Apr 2, 202687485123USLevel 1No
Apr 2, 202687489561CALevel 2No
Apr 2, 202687484874USLevel 1No
Apr 2, 202687477099KYLevel 1No
Apr 2, 202687481120CALevel 1No
Apr 2, 202687484160USLevel 1No
Apr 2, 202687489383CALevel 2No
Apr 2, 202687483894MOLevel 1No
Apr 2, 202687476503USLevel 1No
Apr 1, 202687459160USLevel 1No
Apr 1, 202687483269FLLevel 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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