393.83(d) — Improper exhaust - Bus (Powered by other than Gasoline)
FMCSA violation code under Vehicle Maintenance. 355 events recorded in roadside inspections. Severity weight: N/A.
Violation Description
Improper exhaust - Bus (Powered by other than Gasoline)
About This Violation Code
Code 393.83(d) 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 393.83 in the Federal Motor Carrier Safety Regulations.
Top Carriers Cited
Ranked by frequency • 206 carriers total • Page 1 of 9
Top Carriers with 393.83(d) Violations
Showing 25 of 206
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | SAN DIEGO UNIFIED SCHOOL DISTRICT | 2808560 | 55 |
| #2 | LOS ANGELES UNIFIED SCHOOL DISTRICT | 2807610 | 17 |
| #3 | FIRST STUDENT INC | 354406 | 12 |
| #4 | TORNADO BUS COMPANY | 565859 | 12 |
| #5 | SANTA BARBARA TRANSPORTATION CORP | 677713 | 9 |
| #6 | KINGSBURG JOINT UNION HIGH SCHOOL DISTRICT | 2809515 | 4 |
| #7 | PACER ENTERPRISES INC | 2737387 | 4 |
| #8 | AN EXTRAORDINAR LIMOUSINE INC | 1577543 | 3 |
| #9 | ISS ACTION INC | 3406178 | 3 |
| #10 | ABE'S TRANSPORTATION INC | 841835 | 3 |
| #11 | NEW JERSEY TRANSIT CORPORATION | 74293 | 3 |
| #12 | M & C ENTERPRISE INC | 1030397 | 3 |
| #13 | LIFEWISE ACADEMY LLC | 4116996 | 3 |
| #14 | SOUTHWEST TRANSPORTATION AGENCY | 2809147 | 3 |
| #15 | TRANSPORTES REGIOMONTANOS INC | 1250587 | 3 |
| #16 | PANAMA-BUENA VISTA UNION SCHOOL DISTRICT | 2808771 | 3 |
| #17 | LILY'S BUS LINES INC | 3421807 | 2 |
| #18 | AVALON TRANSPORTATION LLC | 911905 | 2 |
| #19 | GONZALEZ SHUTTLES LLC | 2468731 | 2 |
| #20 | SAN MARCOS UNIFIED SCHOOL DISTRICT | 2673527 | 2 |
| #21 | SALINAS CITY SCHOOL DISTRICT | 2603218 | 2 |
| #22 | MEXICOACH INC | 12660 | 2 |
| #23 | AUTOBUSES LA SULTANA LLC | 3065301 | 2 |
| #24 | NEBRASKA CITY LOURDES CENTRAL | 2199702 | 2 |
| #25 | DELANO JOINT UNION HIGH SCHOOL | 2621508 | 2 |
Recent Inspections
Latest inspections where 393.83(d) was cited • 355 total events • Page 1 of 15
Recent Inspections with 393.83(d)
Showing 25 of 355
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| Oct 11, 2024 | 82886598 | MA | Level 5 | Yes |
| Oct 8, 2024 | 82867052 | MD | Level 5 | Yes |
| Oct 7, 2024 | 82845232 | US | Level 5 | Yes |
| Oct 3, 2024 | 82835628 | KS | Level 2 | No |
| Oct 3, 2024 | 82824033 | MD | Level 5 | Yes |
| Sep 27, 2024 | 82831997 | IL | Level 5 | Yes |
| Sep 25, 2024 | 82773736 | ND | Level 5 | Yes |
| Sep 24, 2024 | 82800949 | US | Level 5 | Yes |
| Sep 23, 2024 | 82788932 | MN | Level 5 | Yes |
| Sep 20, 2024 | 82749107 | PA | Level 1 | Yes |
| Sep 19, 2024 | 82729997 | US | Level 5 | Yes |
| Sep 19, 2024 | 82704881 | SC | Level 5 | Yes |
| Sep 18, 2024 | 82761062 | CA | Level 5 | No |
| Sep 18, 2024 | 82761063 | CA | Level 5 | No |
| Sep 16, 2024 | 82724838 | MO | Level 5 | Yes |
| Sep 16, 2024 | 82667101 | MD | Level 5 | No |
| Sep 11, 2024 | 82872066 | CA | Level 5 | Yes |
| Sep 11, 2024 | 82633668 | OH | Level 5 | Yes |
| Sep 5, 2024 | 82590089 | CA | Level 5 | No |
| Sep 4, 2024 | 82593006 | TN | Level 2 | Yes |
| Sep 4, 2024 | 82851352 | CA | Level 5 | No |
| Sep 3, 2024 | 82569440 | MA | Level 2 | No |
| Aug 29, 2024 | 82541737 | CA | Level 5 | No |
| Aug 28, 2024 | 82708267 | CA | Level 5 | No |
| Aug 26, 2024 | 82502366 | CA | Level 5 | Yes |