393.48(a) — Inoperative/defective brakes
FMCSA violation code under Vehicle Maintenance. 59,449 events recorded in roadside inspections. Severity weight: 8. Out-of-service eligible.
Violation Description
One or more brakes on the commercial motor vehicle are inoperative or defective.
About This Violation Code
Code 393.48(a) 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). This violation is Out-of-Service eligible, meaning the driver or vehicle may be placed out of service at roadside when cited.
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 393.48 in the Federal Motor Carrier Safety Regulations.
Top Carriers Cited
Ranked by frequency • 28,571 carriers total • Page 1 of 1143
Top Carriers with 393.48(a) Violations
Showing 25 of 28,571
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | J B HUNT TRANSPORT INC | 80806 | 108 |
| #2 | WESTERN EXPRESS INC | 511412 | 104 |
| #3 | SWIFT TRANSPORTATION CO OF ARIZONA LLC | 54283 | 96 |
| #4 | EVANS DELIVERY COMPANY INC | 38111 | 87 |
| #5 | UNITED PARCEL SERVICE INC | 21800 | 78 |
| #6 | BENNETT TRUCK TRANSPORT LLC | 600382 | 65 |
| #7 | SCHNEIDER NATIONAL CARRIERS INC | 264184 | 61 |
| #8 | ACME TRUCK LINE INC | 52767 | 54 |
| #9 | SELECT WATER SOLUTIONS LLC | 1609544 | 52 |
| #10 | WLLC TRANSPORT INC | 3759529 | 43 |
| #11 | MR BULT'S INC | 387102 | 41 |
| #12 | USA TRUCK LLC | 213754 | 38 |
| #13 | TEXAS CHROME TRANSPORT INC | 2203204 | 36 |
| #14 | BENNETT MOTOR EXPRESS LLC | 92693 | 35 |
| #15 | RYDER TRANSPORTATION SOLUTIONS LLC | 299073 | 34 |
| #16 | SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV | 818175 | 32 |
| #17 | ESTES EXPRESS LINES | 121018 | 30 |
| #18 | KNIGHT TRANSPORTATION INC | 428823 | 29 |
| #19 | OPERADORA DE TRANSPORTE INTERNACIONAL SA DE CV | 683428 | 29 |
| #20 | STONE TRANSPORT LIMITED PARTNERSHIP | 300960 | 28 |
| #21 | AGGREGATE HAULERS I L P | 1021485 | 28 |
| #22 | RS TRANSFER SA DE CV | 1156825 | 27 |
| #23 | TRANSPORT INDIANA LLC | 3057791 | 27 |
| #24 | TRANSPORTES REFRIGERADOS GC XPRESS SA DE CV | 2563803 | 26 |
| #25 | PENSKE LOGISTICS LLC | 268015 | 26 |
Recent Inspections
Latest inspections where 393.48(a) was cited • 59,449 total events • Page 1 of 2378
Recent Inspections with 393.48(a)
Showing 25 of 59,449
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| Oct 15, 2024 | 82906411 | DE | Level 1 | No |
| Oct 15, 2024 | 82907794 | US | Level 1 | No |
| Oct 15, 2024 | 82907872 | NY | Level 2 | No |
| Oct 15, 2024 | 82910509 | OK | Level 1 | No |
| Oct 15, 2024 | 82906394 | US | Level 1 | No |
| Oct 15, 2024 | 82908223 | OR | Level 1 | Yes |
| Oct 15, 2024 | 82910473 | OK | Level 1 | No |
| Oct 15, 2024 | 82913843 | CA | Level 1 | No |
| Oct 14, 2024 | 82914291 | CA | Level 1 | No |
| Oct 14, 2024 | 82899536 | OK | Level 1 | No |
| Oct 14, 2024 | 82904810 | US | Level 1 | No |
| Oct 14, 2024 | 82904832 | US | Level 1 | No |
| Oct 14, 2024 | 82902362 | CA | Level 1 | No |
| Oct 14, 2024 | 82900239 | NV | Level 1 | No |
| Oct 14, 2024 | 82913379 | CA | Level 5 | Yes |
| Oct 14, 2024 | 82912426 | TX | Level 2 | No |
| Oct 14, 2024 | 82898432 | US | Level 1 | No |
| Oct 14, 2024 | 82904771 | US | Level 1 | Yes |
| Oct 14, 2024 | 82913033 | TX | Level 1 | No |
| Oct 14, 2024 | 82913254 | CA | Level 1 | No |
| Oct 14, 2024 | 82910583 | IA | Level 1 | No |
| Oct 14, 2024 | 82908959 | MD | Level 1 | Yes |
| Oct 14, 2024 | 82911156 | NE | Level 1 | Yes |
| Oct 14, 2024 | 82911157 | NE | Level 1 | No |
| Oct 14, 2024 | 82911344 | WY | Level 1 | No |