TruckCodex

393.50D — Steering mechanism defective

FMCSA violation code under Vehicle Maintenance. 338 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
338
Code
393.50D
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
338
Carriers Cited
308

Violation Description

Steering mechanism on commercial motor vehicle is defective, broken, or not functioning properly.

About This Violation Code

Code 393.50D 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 393.50D in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
338
OOS Events
0
OOS Rate
0.0%
Top State (180d)
Texas
115 events

Top Enforcing States

Where 393.50D is most commonly cited (last 180 days)

1.Texas
115
OOS 0.0%
2.New Mexico
2
OOS 0.0%
3.Illinois
1
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 393.50D citations. Red bars mark months with OOS-triggering citations.

2
Apr
15
May
13
Jun
18
Jul
6
Aug
18
Sep
35
Oct
14
Nov
18
Dec
28
Jan
18
Feb
21
Mar
1
Apr

Most Active Stations

Inspection stations citing 393.50D most often (last 180 days)

1.COLUMBIA POE
23
OOS 0.0%
2.US-0290 IN HARRIS CO. (706-738
9
OOS 0.0%
3.SH-0249 IN HARRIS CO. (450-470
5
OOS 0.0%
4.VETERANS POE
4
OOS 0.0%
5.CAMINO REAL POE
4
OOS 0.0%
6.INDIOS POE
3
OOS 0.0%
7.SH-0183 IN DALLAS CO. (586-596
3
OOS 0.0%
8.BOTA POE
3
OOS 0.0%
9.SL-0012 IN DALLAS CO. (588-632
3
OOS 0.0%
10.IH35 SB SAN MARCOS SCALE
2
OOS 0.0%

Often Cited Together

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

392.2RG30 co-occurrences393.929 co-occurrences393.47E23 co-occurrences396.5B17 co-occurrences393.1116 co-occurrences393.53B15 co-occurrences393.45B2UV15 co-occurrences396.17C14 co-occurrences396.3A111 co-occurrences393.7810 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 308 carriers total • Page 1 of 13

Top Carriers with 393.50D Violations

Showing 25 of 308

fmcsa-violations
Top Carriers with 393.50D Violations
#CarrierUSDOT# Violations
#1CRESCENCIO LUNA MARTINEZ7995844
#2MORA SERVICES CORPORATION43197943
#3SANDRO AMERICO RAMIREZ ORTIZ24485572
#4JULIO CESAR RAYMUNDO23209922
#5JOSE FERNANDO CARBAJO JIMENEZ32176072
#6CAPSTONE WASTE INC34638482
#7GERARDO CAVAZOS SALAZAR8617742
#8LUCIANA VERONICA RODRIGUEZ SANCHEZ29410612
#9STATEWIDE TRUCKING CORP3888862
#10RS TRANSFER SA DE CV11568252
#11LIUDMILA NUNEZ PEREZ44751112
#12MOVENTUM TRANSFER SA DE CV36302792
#13ELIAS ALMANZA19505592
#14TRANSPORTACIONES DE COMERCIO INTERCONTINENTAL SA DE CV29528372
#15MARIO ALBERTO TREJO14194092
#16MOISES DE LOERA LOPEZ34490012
#17A GUEVARA TRUCKING LLC25320622
#18LAFUENTE PATLAN LLC40151712
#19ZAK VANVOORHIS42855972
#20RAAF SERVICIOS LOGISTICOS SA DE CV37364212
#21JUAN ANDRES QUINTANA JIMBO31524792
#22ALFREDO GARCIA GARCIA35400862
#23UNITED PETROLEUM TRANSPORTS INC1850402
#24IMC LOGISTICS LLC2929912
#25CARMEN TRUCKING LLC41618772

Recent Inspections

Latest inspections where 393.50D was cited • 338 total events • Page 1 of 14

Recent Inspections with 393.50D

Showing 25 of 338

fmcsa-inspections
Recent Inspections with 393.50D
DateReport #StateLevelOOS
Apr 1, 202687488239TXLevel 1No
Mar 31, 202687479755TXLevel 1No
Mar 31, 202687487529TXLevel 2No
Mar 30, 202687487831TXLevel 1No
Mar 27, 202687488141TXLevel 1No
Mar 26, 202687466803TXLevel 1No
Mar 25, 202687410106TXLevel 1No
Mar 23, 202687423057TXLevel 1No
Mar 19, 202687385935TXLevel 1No
Mar 16, 202687323562TXLevel 2No
Mar 12, 202687302734TXLevel 2No
Mar 12, 202687314563TXLevel 2No
Mar 12, 202687302742TXLevel 1No
Mar 11, 202687276581TXLevel 1No
Mar 9, 202687264994TXLevel 1No
Mar 9, 202687314359TXLevel 2No
Mar 5, 202687264998TXLevel 1No
Mar 4, 202687324249TXLevel 1No
Mar 3, 202687227472TXLevel 1No
Mar 3, 202687205340TXLevel 1No
Mar 2, 202687264794TXLevel 1No
Mar 2, 202687191873TXLevel 1No
Feb 25, 202687192020TXLevel 2No
Feb 24, 202687152145TXLevel 1No
Feb 23, 202687181863TXLevel 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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