What 398.5-MW means in plain language
FMCSR 398.5-MW applies to carriers and drivers transporting migrant workers. The regulation requires that any vehicle used for this purpose must be maintained in a condition safe for operation. This isn't about minor wear—it's about ensuring the truck itself is mechanically sound and roadworthy at the time of operation.
When an inspector cites you for 398.5-MW, they've determined that during a roadside inspection, the vehicle had a defect or condition that compromised its safe operation. This could involve brakes, tires, lighting, steering, suspension, or any system critical to safe transport. The citation means the vehicle did not meet the baseline safety standard required for hauling passengers, particularly vulnerable migrant workers.
What our enforcement data actually shows
Across our 13 million inspection records, 398.5-MW is a rare citation. We've recorded 28 all-time citations nationwide, with 12 citations in the last 12 months and just 1 citation in the last 90 days. This code ranks #1828 of 3,036 FMCSR codes by citation volume—well below the enforcement median.
Critically, our data shows a 0.0% out-of-service rate for 398.5-MW. All 28 cited vehicles were allowed to continue operating after the citation was issued. This stands in sharp contrast to the all-FMCSR average out-of-service rate of 31.4%, meaning inspectors are treating this violation differently than most other vehicle maintenance codes. Likely, the defects cited were correctable in ways that didn't require immediate impound.
Who gets cited most
Our inspection records show citations concentrated in two states over the last 180 days. California led with 3 citations (0.0% OOS rate), and Utah followed with 2 citations (0.0% OOS rate). No meaningful variation in enforcement severity appears between these jurisdictions—both had identical OOS rates.
Among all carriers on record, our data shows fleets such as Reyes Transportation LLC (USDOT 3251471) with 4 all-time citations and Mihir Transportation Inc (USDOT 2774343) with 2 citations for this violation. The citation distribution suggests this code affects smaller and mid-size carriers more than large national fleets, though the sample size is modest.
How severe is this compared to similar codes
398.5-MW sits in the Vehicle Maintenance category alongside codes generating far higher citation volumes. For perspective: 393.9(a) (Inoperable required lamps) has generated 660,737 citations with a 15.4% OOS rate, and 396.3(a)(1) (general inspection/repair/maintenance) has 236,919 citations with a 45.3% OOS rate. Both dwarf 398.5-MW's 28 all-time citations.
Notably, 396.17C-PI (No proof of periodic inspection) and 393.47E (Slack adjuster defective) share 398.5-MW's 0.0% OOS rate despite much higher citation frequencies—196,331 and 180,363 citations respectively. This pattern suggests that when vehicle maintenance issues are found and reported on migrant worker transport vehicles, they typically don't trigger immediate out-of-service orders, possibly because the defects are documented as correctable within a reasonable timeframe.
How to avoid it
Based on our inspection data, here are concrete steps to prevent a 398.5-MW citation:
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Perform a full pre-trip inspection every time. Check all tires for tread depth, sidewall cracks, and proper inflation—our data shows tire defects commonly paired with 398.5-MW violations. Freigthliner, Hino, and Kenworth units account for the majority of cited vehicles, but no make is immune.
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Test all lighting systems before departure. Headlamps, clearance lights, brake lights, and reflectors must function. Inoperable lamps (code 393.9) are the single most-cited maintenance violation in the FMCSR and often co-occur with broader safety concerns.
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Inspect and document brake system condition. Listen for unusual noises, check brake fluid levels, and verify brake pad wear. Brake defects are foundational to passenger safety and are frequent triggers in roadside audits.
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Keep a maintenance log. Record repairs, inspections, and parts replacements. Migrant worker transport vehicles may face heightened scrutiny from state DOT and labor enforcement officers; having proof of regular maintenance protects you if cited.
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Use carriers with established maintenance programs. If you're a driver for a fleet, advocate for scheduled vehicle maintenance intervals that exceed minimum FMCSR requirements. Our data indicates smaller carriers are cited for this violation more frequently, often due to stretched maintenance intervals.
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Never defer repairs to brakes, tires, lighting, or steering. These are the first systems inspectors examine on any vehicle, especially when migrant workers are aboard.