TruckCodex

393.50C — Steering mechanism defective

FMCSA violation code under Vehicle Maintenance. 712 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
712
Code
393.50C
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
712
Carriers Cited
528

Violation Description

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

About This Violation Code

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

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
712
OOS Events
0
OOS Rate
0.0%
Top State (180d)
Texas
232 events

Top Enforcing States

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

1.Texas
232
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 393.50C citations. Red bars mark months with OOS-triggering citations.

10
Apr
56
May
22
Jun
41
Jul
38
Aug
36
Sep
33
Oct
43
Nov
37
Dec
37
Jan
53
Feb
41
Mar
2
Apr

Most Active Stations

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

1.COLUMBIA POE
121
OOS 0.0%
2.IH 35 NB MILE MARKER
16
OOS 0.0%
3.US77 RIVIERA SCALE
14
OOS 0.0%
4.INDIOS POE
8
OOS 0.0%
5.PHARR POE
7
OOS 0.0%
6.US281 SB FALFURRIAS SCALE
5
OOS 0.0%
7.IH35 SB SAN MARCOS SCALE
4
OOS 0.0%
8.IH 35 NB MM 59
2
OOS 0.0%
9.FM 509-US HIGHWAY 28
2
OOS 0.0%
10.IH10 WB AT MP 678
2
OOS 0.0%

Often Cited Together

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

393.45B2UV64 co-occurrences393.940 co-occurrences391.11B2-Z40 co-occurrences396.5B36 co-occurrences393.53B22 co-occurrences393.47E22 co-occurrences393.1118 co-occurrences396.3A114 co-occurrences393.75C13 co-occurrences393.48A12 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 528 carriers total • Page 1 of 22

Top Carriers with 393.50C Violations

Showing 25 of 528

fmcsa-violations
Top Carriers with 393.50C Violations
#CarrierUSDOT# Violations
#1AUTOLINEAS AMERICA SA DE CV83077810
#2TRANSPORTES LARMEX SA DE CV24363539
#3JOSE ALONSO SARMIENTO TORRES22899928
#4TRANSPORTES ORTA SA DE CV30858308
#5EFT EXPRESS SA DE CV25331057
#6BETOS TRUCKING SA DE CV23062856
#7AUTOTRANSPORTES VARELA DAVILA SA DE CV17168246
#8LAURA ESTELA ESTRADA GARZA25299236
#9TRANSFRONTERA SA DE CV11622086
#10LUCA AUTOTRANSPORTES SA DE CV32104585
#11MOVENTUM TRANSFER SA DE CV36302795
#12TRANSPORTES CANALES S A DE C V5588994
#13TSI LOGISTICA FRONTERIZA S DE RL DE CV24127934
#14TRANSPORTES SURTEX SA DE CV32899314
#15SERVICIOS ESPECIALIZADOS ALANIS SA DE CV5594774
#16ADRIAN IVES PORTALES AGUILAR24563894
#17TRANSPORTES Y SERVICIOS GARDEL SA DE CV18327204
#18SOLUCIONES LOGISTICAS DEL NORTE SA DE CV34591054
#19SANDRA CECILIA ROMERO LOREDO33728153
#20MARIA CRISTINA SOLIS MONTEMAYOR39415483
#21AUTOTRANSPORTES ROMEDU SA DE CV11482593
#22EXPRESS 57 SA DE CV28619943
#23JULIO CESAR CIENFUEGOS GARZA23895663
#24JOSE ANGEL CASTILLO GONZALEZ33335793
#25ADAN SERNA PEREZ12365193

Recent Inspections

Latest inspections where 393.50C was cited • 712 total events • Page 1 of 29

Recent Inspections with 393.50C

Showing 25 of 712

fmcsa-inspections
Recent Inspections with 393.50C
DateReport #StateLevelOOS
Apr 1, 202687479470TXLevel 1No
Apr 1, 202687487671TXLevel 1No
Mar 30, 202687468420TXLevel 1No
Mar 30, 202687468833TXLevel 1No
Mar 30, 202687468421TXLevel 1No
Mar 30, 202687466666TXLevel 1No
Mar 27, 202687468955TXLevel 1No
Mar 26, 202687466490TXLevel 1No
Mar 20, 202687466860TXLevel 1No
Mar 20, 202687466791TXLevel 1No
Mar 18, 202687396992TXLevel 1No
Mar 18, 202687324333TXLevel 2No
Mar 18, 202687396993TXLevel 1No
Mar 17, 202687324537TXLevel 1No
Mar 17, 202687385711TXLevel 1No
Mar 17, 202687325030TXLevel 1No
Mar 16, 202687385113TXLevel 1No
Mar 13, 202687397646TXLevel 1No
Mar 13, 202687323669TXLevel 1No
Mar 13, 202687410636TXLevel 1No
Mar 13, 202687303846TXLevel 2No
Mar 12, 202687304168TXLevel 1No
Mar 12, 202687323667TXLevel 1No
Mar 11, 202687304061TXLevel 1No
Mar 10, 202687276040TXLevel 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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