TruckCodex

393.203B — Cab/body improperly secured to frame

FMCSA violation code under Vehicle Maintenance. 735 events recorded in roadside inspections. Severity weight: N/A.

Severity Weight
N/A
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
735
Code
393.203B
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
N/A
Violation Group
—
Total Events
735
Carriers Cited
631

Violation Description

Cab/body improperly secured to frame

About This Violation Code

Code 393.203B 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 393.203B in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
735
OOS Events
20
OOS Rate
2.7%
Top State (180d)
Texas
127 events

Top Enforcing States

Where 393.203B is most commonly cited (last 180 days)

1.Texas
127
OOS 2.4%
2.Illinois
35
OOS 0.0%
3.Iowa
15
OOS 0.0%
4.New Mexico
8
OOS 0.0%
5.North Carolina
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 393.203B citations. Red bars mark months with OOS-triggering citations.

19
Apr
42
May
31
Jun
34
Jul
40
Aug
45
Sep
43
Oct
46
Nov
25
Dec
20
Jan
38
Feb
36
Mar
2
Apr

Most Active Stations

Inspection stations citing 393.203B most often (last 180 days)

1.PHARR POE
12
OOS 8.3%
2.COLUMBIA POE
11
OOS 0.0%
3.01 - I80 WB MM 151 MITCHELLVIL
5
OOS 0.0%
4.SL-0336 IN MONTGOMERY CO. (674
5
OOS 0.0%
5.VETERANS POE
4
OOS 0.0%
6.11250 SEVEN COVE RD
3
OOS 0.0%
7.11491 OLD MONTGOMERY
3
OOS 0.0%
8.I-39
3
OOS 0.0%
9.2255 TX276
3
OOS 0.0%
10.80
3
OOS 0.0%

Often Cited Together

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

393.940 co-occurrences392.2RG16 co-occurrences393.7816 co-occurrences393.47E13 co-occurrences393.95A10 co-occurrences393.45B2UV9 co-occurrences396.3A19 co-occurrences393.48A8 co-occurrences393.9H8 co-occurrences393.53B8 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 631 carriers total • Page 1 of 26

Top Carriers with 393.203B Violations

Showing 25 of 631

fmcsa-violations
Top Carriers with 393.203B Violations
#CarrierUSDOT# Violations
#1WILLIAMS BROTHERS CONSTRUCTION CO INC276418
#2K AND K CONSTRUCTION INC19709927
#3CAPROCK PRECAST LLC29936864
#4ARSENIO ELIZONDO QUIROGA30239874
#5POTTER GRADING & MATERIALS23881784
#6AMRIZE SOUTH CENTRAL INC1133784
#7ABEL HERNANDEZ R25765924
#8FLETES INTERNACIONALES BALO SA DE CV5588554
#9JUAN GALLAGA TRUCKING LLC23030293
#10REBEL CONTRACTORS INC20502773
#11A&V HAULING LLC30018313
#12FEDERAL EXPRESS CORPORATION868763
#13NOEL RENE GONZALEZ PEREZ39687303
#14POTROS CONCRETE LLC35087723
#15APEX CONCRETE CONSTRUCTION INC43017053
#16PREMAR TRANSPORT LLC30701373
#17JOSE ADAN BONILLA ZETINO43127483
#18SUSTAITA CARGO SA DE CV19698103
#19QRO MEX CONSTRUCTION CO INC20770502
#20M&J FREIGHT LINE LLC34957862
#21PENNSYLVANIA STEEL COMPANY INC4524872
#22TODD TRANSIT INC1429622
#23PBCB MANAGEMENT LLC4466482
#24S & P SALES AND TRUCKING LLC22760682
#25MENDOZA BCS TRUCKING LLC22726382

Recent Inspections

Latest inspections where 393.203B was cited • 735 total events • Page 1 of 30

Recent Inspections with 393.203B

Showing 25 of 735

fmcsa-inspections
Recent Inspections with 393.203B
DateReport #StateLevelOOS
Apr 2, 202687486799ILLevel 2No
Apr 1, 202687477603ILLevel 1No
Mar 31, 202687477670ILLevel 1No
Mar 30, 202687465712ILLevel 1No
Mar 30, 202687453504ILLevel 1No
Mar 27, 202687453238IALevel 1No
Mar 27, 202687467952TXLevel 2No
Mar 27, 202687453239IALevel 1No
Mar 27, 202687453204IALevel 1No
Mar 25, 202687424266TXLevel 2No
Mar 24, 202687408463IALevel 1No
Mar 24, 202687408451IALevel 1No
Mar 23, 202687409116ILLevel 2No
Mar 22, 202687371075IALevel 1No
Mar 20, 202687384846TXLevel 2No
Mar 20, 202687372273ILLevel 1No
Mar 20, 202687372052ILLevel 1No
Mar 19, 202687344244TXLevel 2No
Mar 19, 202687344246TXLevel 2No
Mar 18, 202687353573NMLevel 1No
Mar 17, 202687323780TXLevel 2No
Mar 16, 202687410496TXLevel 1No
Mar 13, 202687290923ILLevel 1No
Mar 13, 202687302726TXLevel 2No
Mar 12, 202687283594IALevel 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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