FMCSR 393.203: Cab & Body Parts Violations Explained

Almost certainly not. FMCSR 393.203 is not OOS-eligible under the standard criteria, and our inspection records back that up: across 3,885 all-time citations, only 85 vehicles were placed out of service — a 2.2% OOS rate. For context, the all-FMCSR average OOS rate is 31.4%, meaning 393.203 sits well below the typical enforcement threshold. You'll likely receive the citation and be sent on your way, but the violation still enters your inspection record and affects your CSA score, so it's not something to ignore.

The FMCSA CSA system assigns a severity weight to each violation code; that weight is then multiplied based on how recently the inspection occurred — violations in the last 6 months carry the highest multiplier (3×), those from 7–12 months back carry a 2× multiplier, and anything older carries 1×. The specific severity weight for 393.203 is not published in the data available here, so check your SMS Behavioral Analysis and Safety Improvement Category (BASIC) score directly on the FMCSA portal after the inspection clears, typically within 30 days. The citation falls under the Vehicle Maintenance BASIC.

Take these steps immediately:

1. Document the condition. Photograph every cab and body part mentioned on the inspection report before any repairs.
2. Check for companion violations. Our inspection records show 393.203 frequently appears alongside 393.9 (inoperable lamps, 32 shared inspections in the last 90 days), 393.78 (defective windshield, 21 shared inspections), and 393.95A (missing or defective fire extinguisher, 17 shared inspections). Make sure those items are also inspected and repaired.
3. Repair and document. Get a dated, signed repair order.
4. File in your DVIRs going forward to show corrective action was taken.
5. Monitor your CSA BASIC score after the record posts.

Relatively minor by OOS risk, but not by volume. The 2.2% OOS rate for 393.203 is far below peer codes in the Vehicle Maintenance category — for example, 396.3(a)(1) carries a 45.3% OOS rate across 236,919 citations, and even the common 393.9(a) inoperable lamps code hits a 15.4% OOS rate across 660,737 citations. The all-FMCSR average is 31.4%. So on the out-of-service scale, 393.203 is a low-severity finding. That said, it ranks #395 out of 3,036 FMCSR codes by citation volume, meaning inspectors do write it regularly — 485 times in the last 12 months alone.

Yes, you can challenge it. The FMCSA DataQs system (Request for Data Review, or RDR) lets drivers and carriers formally dispute inspection findings they believe were issued in error. For an equipment-based violation like 393.203, a strong challenge typically includes repair documentation dated before the inspection, photographs showing the part was compliant, or evidence that the cited component doesn't meet the definition of a violation. Submit your RDR at the FMCSA DataQs portal with all supporting documents attached. If the challenge is upheld, the citation is removed from your inspection record and your CSA score is recalculated.

Texas dominates by a wide margin. Our inspection records for the last 180 days show Texas issued 147 citations under 393.203 — more than six times the next closest state. New Mexico was second with 22 citations, and Illinois third with 20. North Carolina logged 12 citations during the same period. If your routes run through Texas in particular, this is a code worth building into your pre-trip inspection checklist. Notably, Texas also recorded the only OOS placement in that window — 1 out of 147 citations, a 0.7% rate.

Don't wait. Even though the 2.2% all-time OOS rate means you likely won't be parked on the spot, the violation is live in your CSA record the moment the inspection is processed. Our database shows 90 citations issued under 393.203 in just the last 90 days, with recent monthly counts running between 23 and 62 per month — enforcement is consistent and ongoing, not seasonal. If you're re-inspected with an open, unrepaired defect already on your record, the consequences compound. Get the repair done, document it, and carry that paperwork.

Both are affected, but in different ways. Under the FMCSA CSA system, equipment violations like 393.203 are assigned to the carrier's Vehicle Maintenance BASIC — the carrier owns the equipment and is responsible for its condition. However, the inspection record is also tied to the driver who was operating the vehicle at the time. Carriers with repeat citations under this code do show up in our data: UNITED PARCEL SERVICE INC leads all-time with 14 citations, followed by FEDERAL EXPRESS CORPORATION and GOLDII LOCS TRUCKING with 10 each. Fleet safety managers should track this code as a carrier-level maintenance indicator.