FMCSR 393.95(a): Fire Extinguisher Violations Explained

Almost certainly not in practice. Across 105,458 all-time citations for 393.95(a) in our inspection records, only 7 vehicles were ever placed out of service — producing an effective OOS rate of 0.0%. For context, the all-FMCSR average OOS rate is 31.4%, so this code sits dramatically below the norm. Inspectors have broad discretion, and the data shows they almost never pull a truck for a missing or defective fire extinguisher alone. That said, OOS eligibility is on the books, so correcting the defect before your next inspection is still the smart move.

A 393.95(a) citation carries a CSA severity weight of 5 in the Vehicle Maintenance BASIC. That base score is then multiplied depending on how recently the violation occurred — violations within 6 months of the inspection that triggers the calculation carry the highest time-weight multiplier, dropping at the 6-month and 12-month marks. The violation stays on your SMS record for 24 months. If an inspection results in an OOS order (rare for this code), a time-weight multiplier is also applied to that finding. Getting the citation removed quickly through DataQs, or preventing recurrence, is the most effective way to protect your percentile ranking.

Act the same day. Here's a concrete checklist:

1. Replace or recharge the fire extinguisher to the required specification — it must be properly charged and readily accessible in the cab.
2. Document the fix with a dated receipt or service record; you'll need this if you pursue a DataQs challenge.
3. Check your inspection report for any co-occurring violations. Our inspection records show 393.95(a) citations rarely travel alone on multi-point inspections, so review every line item.
4. Notify your safety department immediately so they can log the corrective action against your vehicle's maintenance file.
5. Verify the extinguisher is mounted accessibly — an extinguisher buried under cargo is treated the same as a missing one.

Relative to peers, 393.95(a) is a low enforcement-severity violation. Its OOS rate of 0.0% compares favorably to other Vehicle Maintenance codes in our database — for example, 396.3(a)(1) (inspection/repair/maintenance - general) carries a 45.3% OOS rate across 236,919 citations, and 393.9(a) (inoperable required lamps) carries 15.4% across 660,737 citations. On citation volume, however, 393.95(a) ranks #16 out of 3,036 FMCSR codes with 105,458 all-time citations, meaning inspectors write it frequently even if they rarely OOS a truck for it. High frequency + low OOS = a code that adds CSA points quietly over time if your fleet ignores it.

Yes, you can submit a DataQs Request for Data Review (RDR) to challenge this finding. Because 393.95(a) is an equipment violation rather than a documentation violation, the strongest grounds for a successful challenge are: (1) the extinguisher was present, properly charged, and accessible and the inspector made a factual error, or (2) the citation was entered with the wrong code or vehicle identifier. Gather your evidence — photos taken at the scene, maintenance records showing the extinguisher was serviced, or a corrected inspection report from the officer — before filing. Note that DataQs does not remove a valid citation; it only corrects errors of fact.

Our inspection records identify FRHT (Freightliner) vehicles as the most-cited make with 8,771 citations, followed by FORD at 4,781 and KW (Kenworth) at 4,178. On the carrier side, EVANS DELIVERY COMPANY INC leads all carriers with 163 citations, followed by UNITED PARCEL SERVICE INC at 116 and SWIFT TRANSPORTATION CO OF ARIZONA LLC at 104. Note: the STATISTICS block for this code does not include a state-level breakdown, so specific state citation counts cannot be confirmed from our data. Fleet managers operating high-volume national routes should treat this as a universal compliance requirement rather than a regionally targeted one.

Don't wait. While the all-time OOS rate is 0.0% across 105,458 citations, the defect creates real risk beyond roadside enforcement. A fire extinguisher that's missing, discharged, or not readily accessible gives you nothing to fight a cab fire in the first seconds it matters. From a compliance standpoint, the CSA severity weight of 5 means every subsequent inspection where this defect is found adds to your SMS score. A replacement extinguisher costs under $50 at most truck stops — the cost of ignoring it in recurring citations and CSA percentile damage is far higher.

Both, but differently. Under FMCSA's CSA methodology, vehicle maintenance violations like 393.95(a) are attributed to the carrier in the Vehicle Maintenance BASIC, affecting the carrier's SMS percentile. The driver record is also updated — the citation appears on the driver's inspection history and feeds into the driver's individual profile. Practically, the carrier bears the heavier SMS consequences because their overall Vehicle Maintenance BASIC score determines intervention risk. Drivers who accumulate repeated equipment-related citations across multiple carriers can still see patterns flagged in their history. Both parties have a stake in keeping extinguishers compliant.