393.80(a) — Exhaust system defective
FMCSA violation code under Vehicle Maintenance. 286 events recorded in roadside inspections. Severity weight: 4.
Violation Description
Exhaust system on commercial motor vehicle is leaking, not properly secured, or discharging below the floor of the vehicle.
About This Violation Code
Code 393.80(a) falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 4 (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 393.80 in the Federal Motor Carrier Safety Regulations.
Top Carriers Cited
Ranked by frequency • 259 carriers total • Page 1 of 11
Top Carriers with 393.80(a) Violations
Showing 25 of 259
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | JESUS ROHANA AGUILAR | 742428 | 7 |
| #2 | TRANSPORTES NUEVO AMANECER S DE RL DE CV | 1435452 | 3 |
| #3 | JUANA MONTOYA RUBIO | 3044830 | 3 |
| #4 | RAMIRO BOHON RUIZ | 611489 | 3 |
| #5 | ENLACES DE TRANSPORTES INTERNACIONALES SA DE CV | 650125 | 2 |
| #6 | JORGE ARMANDO PINEDA CERVANTES | 2339278 | 2 |
| #7 | TRANSPORTES GUERRERO | 1150322 | 2 |
| #8 | LOURDES MARGARITA PUEBLA MALDONADO | 1483551 | 2 |
| #9 | MARTIN VELASCO HERNANDEZ | 2819940 | 2 |
| #10 | JUAN CARLOS SOTO CARRANZA | 3585139 | 2 |
| #11 | FLAVIO FIGUEROA PORTILLO | 3044259 | 2 |
| #12 | JESUS PEDRO PEREZ CARRILLO | 1159851 | 2 |
| #13 | TSM CONNECT SA DE CV | 2134155 | 2 |
| #14 | TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V | 1041907 | 2 |
| #15 | TERRA FIRST LLC | 2294085 | 2 |
| #16 | ANA LLUVIA DE LA GARZA GONZALEZ | 4000738 | 2 |
| #17 | FLETES MEX SA DE CV | 633494 | 2 |
| #18 | HARLOWS SCHOOL BUS SERVICE INC | 1662560 | 2 |
| #19 | AUTOBUSES EJECUTIVOS LLC | 1044521 | 2 |
| #20 | YOSI CHAIUN | 2435115 | 1 |
| #21 | TCN INTERNACIONAL SA DE CV | 944687 | 1 |
| #22 | 360 EXPRESS SA DE CV | 3850583 | 1 |
| #23 | MASSACHUSETTS MATERIAL MANAGEMENT INC | 2861483 | 1 |
| #24 | PIONEER AUTO & WRECKING INC | 661547 | 1 |
| #25 | PULLEY ENTERPRISE LLC | 4167858 | 1 |
Recent Inspections
Latest inspections where 393.80(a) was cited • 286 total events • Page 1 of 12
Recent Inspections with 393.80(a)
Showing 25 of 286
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| Oct 15, 2024 | 82908748 | MD | Level 2 | No |
| Oct 14, 2024 | 82914012 | CA | Level 5 | No |
| Oct 10, 2024 | 82897875 | US | Level 1 | No |
| Oct 10, 2024 | 82876808 | US | Level 1 | No |
| Oct 10, 2024 | 82907864 | US | Level 1 | No |
| Oct 9, 2024 | 82880302 | MI | Level 1 | No |
| Oct 9, 2024 | 82862018 | CT | Level 2 | No |
| Oct 9, 2024 | 82888057 | KS | Level 1 | No |
| Oct 8, 2024 | 82875321 | WA | Level 2 | No |
| Oct 8, 2024 | 82872878 | UT | Level 1 | No |
| Oct 7, 2024 | 82863598 | ND | Level 2 | No |
| Oct 7, 2024 | 82866176 | MA | Level 1 | No |
| Oct 7, 2024 | 82846262 | MD | Level 1 | No |
| Oct 7, 2024 | 82852922 | US | Level 1 | No |
| Oct 7, 2024 | 82876606 | US | Level 1 | No |
| Oct 4, 2024 | 82885329 | AZ | Level 1 | No |
| Oct 3, 2024 | 82840719 | US | Level 1 | No |
| Oct 3, 2024 | 82840261 | WA | Level 2 | No |
| Oct 3, 2024 | 82840044 | WA | Level 2 | No |
| Oct 3, 2024 | 82874969 | NY | Level 2 | No |
| Oct 3, 2024 | 82835662 | KS | Level 2 | No |
| Oct 3, 2024 | 82835406 | OK | Level 2 | No |
| Oct 3, 2024 | 82873985 | AZ | Level 2 | No |
| Oct 3, 2024 | 82830586 | US | Level 1 | No |
| Oct 3, 2024 | 82838983 | WA | Level 2 | No |