FMCSR 390.403A Citations: Penalties, OOS Risk & What to Do

No. Across our 13 million inspection records, 390.403A resulted in an out-of-service order in only 3.1% of all-time cases (13 out of 419 citations). The national average OOS rate for all FMCSR codes is 31.4%, so this violation is significantly less likely to trigger roadside removal compared to most other citations. However, the code is not automatically exempt—the specific circumstances of your inspection determine whether an officer places the vehicle OOS.

First, obtain a copy of the citation from the officer and photograph the inspection report. Document the violation and any photos taken. Next, review your maintenance and operation logs. Our inspection records show that 390.403A frequently co-occurs with lighting defects (393.9, 22 shared inspections in the last 90 days), equipment failures (393.95A, 16 shared inspections), and fatigue violations (392.2RG, 20 shared inspections). Inspect those systems immediately. Then contact your carrier's compliance officer or a transportation attorney to review the citation details and determine if requesting a DataQs challenge is appropriate.

No, it's among the least serious violations in its category. Our database shows 390.403A ranks #980 out of 3,036 FMCSR codes by citation volume with only 419 all-time citations. Peer codes in the General/Admin category issued far more frequently—390.21TB2-DOT has 74,663 citations, and 390.21T(b) has 61,097. More importantly, 390.403A's 3.1% OOS rate is much lower than the 31.4% national average. You are unlikely to face immediate vehicle removal, but address the violation before your next inspection.

In the last 90 days, our records show 55 citations for 390.403A across the United States. That averages to roughly 18 per month. Looking at the most recent months, December 2025 saw a spike with 33 citations, while earlier in the year (April 2025) only 6 were issued. The trend reflects seasonal or operational variation, so citation risk is present year-round but unpredictable month to month.

Texas dominates enforcement for 390.403A, with 122 citations in the last 180 days and a 2.5% OOS rate (3 vehicles placed out of service). Iowa ranks second with 10 citations and a 0.0% OOS rate, followed by Illinois with 4 citations and no out-of-service placements. If you operate in Texas, this violation is more than 12 times as likely to be cited compared to Iowa or Illinois.

Inspectors frequently cite 390.403A alongside other defects in the same roadside stop. Over the last 90 days, our records show the most common co-occurring violations are inoperable required lamps (393.9, 22 shared inspections), operating while ill or fatigued (392.2RG, 20 shared inspections), missing fire extinguishers (393.95A, 16 shared inspections), and windshield defects (393.78, 16 shared inspections). After receiving your citation, walk the vehicle and check all lighting, brakes, tires, and emergency equipment before returning to service.

Freightliners dominate the citation list with 116 all-time citations for 390.403A, followed by Kenworth trucks (89 citations). Utility vehicles (UTIL) account for 55 citations, International trucks 44, and Peterbilt 35. These heavy-duty makes represent the bulk of commercial traffic, so citation frequency correlates with fleet composition rather than inherent design defects.

Yes. The DataQs (Database Quality System) allows you and your carrier to submit a Challenge to the citation within 90 days of the roadside inspection. DataQs focuses on factual errors in the inspection record—for example, if the officer documented a violation that does not actually exist on your vehicle, or misidentified equipment. You will need your citation number, USDOT number, and inspection report. Contact your carrier's safety manager or a FMCSA-certified representative to file. Note that DataQs does not overturn citations based on disagreement with the inspector's judgment, only clear data errors.