TruckCodex

393.48A — Inoperative/defective brakes

FMCSA violation code under Vehicle Maintenance. 26,907 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
26,907
Code
393.48A
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
26,907
Carriers Cited
11,557

Violation Description

One or more brakes on the commercial motor vehicle are inoperative or defective.

About This Violation Code

Code 393.48A 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 393.48A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
26,907
OOS Events
2,585
OOS Rate
9.6%
Top State (180d)
Texas
7,122 events

Top Enforcing States

Where 393.48A is most commonly cited (last 180 days)

1.Texas
7,122
OOS 6.9%
2.Iowa
443
OOS 3.6%
3.Illinois
373
OOS 25.7%
4.New Mexico
215
OOS 13.0%
5.North Carolina
128
OOS 47.7%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 393.48A citations. Red bars mark months with OOS-triggering citations.

581
Apr
1,611
May
1,356
Jun
1,486
Jul
1,540
Aug
1,349
Sep
1,643
Oct
1,464
Nov
1,254
Dec
1,466
Jan
1,743
Feb
1,619
Mar
41
Apr

Most Active Stations

Inspection stations citing 393.48A most often (last 180 days)

1.COLUMBIA POE
311
OOS 3.2%
2.IH10 WB WINNIE SCALE
196
OOS 3.1%
3.IH35 SB DEVINE SCALE
189
OOS 18.5%
4.PHARR POE
183
OOS 4.9%
5.US281 SB FALFURRIAS SCALE
170
OOS 8.8%
6.US77 RIVIERA SCALE
151
OOS 7.3%
7.YSLETA POE
140
OOS 4.3%
8.INDIOS POE
127
OOS 6.3%
9.VETERANS POE
124
OOS 2.4%
10.IH-0030 IN DALLAS CO. (32-64)
115
OOS 7.0%

Often Cited Together

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

393.91,320 co-occurrences396.3A1BOS1,244 co-occurrences393.47E967 co-occurrences393.45B2UV784 co-occurrences392.2RG770 co-occurrences393.53B675 co-occurrences396.17C541 co-occurrences396.3A1529 co-occurrences396.5B475 co-occurrences393.78446 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 11,557 carriers total • Page 1 of 463

Top Carriers with 393.48A Violations

Showing 25 of 11,557

fmcsa-violations
Top Carriers with 393.48A Violations
#CarrierUSDOT# Violations
#1ACME TRUCK LINE INC5276779
#2SUPLICIUM TRANSPORT LLC438125543
#3SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV81817537
#4BENNETT MOTOR EXPRESS LLC9269334
#5SAKARA LLC442953034
#6TRANSPORTADORA NORTE DE CHIHUAHUA S A DE C V71112534
#7TRILLIUM OTR LLC323470433
#8ES EXPRESS LLC353719032
#9EVANS DELIVERY COMPANY INC3811129
#10RIG RUNNERS LLC101449829
#11SELECT DEDICATED SOLUTIONS LLC187714028
#12AGGREGATE HAULERS I L P102148526
#13J B HUNT TRANSPORT INC8080626
#14DAVIS ELITE ENERGY SERVICES LLC317094726
#15MULHOLLAND ENERGY SERVICES LLC244417225
#16POLO TRANSPORTATION LLC424811424
#17TRANSPORTES LARMEX SA DE CV243635324
#18CCS TRANSPORTATION LLC409219824
#19AUTO HAUL EXPRESS LLC432932524
#20AVENSIS ENERGY SERVICES LLC321585123
#21GULF WINDS INTERNATIONAL INC69014723
#22SMYRNA READY MIX CONCRETE LLC173890422
#23ASV XPRESS LLC438930122
#24RAYDEL R LOPEZ LEON316677022
#25PRO FIELD SERVICES INC99524421

Recent Inspections

Latest inspections where 393.48A was cited • 26,907 total events • Page 1 of 1077

Recent Inspections with 393.48A

Showing 25 of 26,907

fmcsa-inspections
Recent Inspections with 393.48A
DateReport #StateLevelOOS
Apr 2, 202687487874TXLevel 2No
Apr 2, 202687487211TXLevel 1No
Apr 2, 202687487919TXLevel 2No
Apr 2, 202687487686TXLevel 1No
Apr 2, 202687487520TXLevel 1Yes
Apr 2, 202687488363TXLevel 1No
Apr 2, 202687487716TXLevel 2No
Apr 2, 202687488345TXLevel 1No
Apr 1, 202687487217TXLevel 2No
Apr 1, 202687478829TXLevel 1No
Apr 1, 202687488050TXLevel 2Yes
Apr 1, 202687487931TXLevel 1No
Apr 1, 202687487134TXLevel 1No
Apr 1, 202687487885TXLevel 1No
Apr 1, 202687477530IALevel 1No
Apr 1, 202687487773TXLevel 1No
Apr 1, 202687479543TXLevel 1No
Apr 1, 202687487810TXLevel 2No
Apr 1, 202687479762TXLevel 1No
Apr 1, 202687479667TXLevel 1No
Apr 1, 202687479664TXLevel 1No
Apr 1, 202687487505TXLevel 2No
Apr 1, 202687488305TXLevel 1No
Apr 1, 202687479822TXLevel 1No
Apr 1, 202687479510TXLevel 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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