What 393.13C3 means in plain language
FMCSR 393.13C3 requires that heavy commercial vehicles manufactured before December 1, 1993 must display upper rear retroreflective sheeting or reflex reflective material. This material is the reflective tape or coating that makes your truck visible to other drivers in darkness when headlights strike it.
If your vehicle was built before that 1993 cutoff date and doesn't have this retroreflective sheeting on the upper rear surfaces (typically the back corners or upper edges of the trailer or cargo area), you're in violation. Vehicles manufactured on or after December 1, 1993 have different retroreflective requirements, so if your rig is newer, this particular code wouldn't apply to you.
The intent is straightforward: older vehicles need this visibility aid to reduce rear-end and side-impact crashes. The material degrades over time, so even if your truck had it years ago, missing or worn sheeting will trigger a citation.
What our enforcement data actually shows
Across our 13 million+ inspection records, 393.13C3 is ranked #763 of 3,036 FMCSR codes by citation volume. Since inception, inspectors have cited this violation 844 times. In the last 12 months, we recorded 501 citations; in the last 90 days, 111.
Here's what makes this code distinct: not a single citation in our database resulted in an out-of-service order. The OOS rate is 0.0% — every driver cited for 393.13C3 was allowed to continue operating. For context, the all-FMCSR average OOS rate is 31.4%, so this violation sits at the lower end of severity in the enforcement spectrum.
Monthly enforcement has been consistent. Over the past 12 months, we've seen citation counts ranging from a low of 17 (April 2025) to a high of 58 (January 2026), with most months clustering between 36 and 48 citations.
Who gets cited most
Our data reveals that Texas dominates the citation landscape for this code. In the last 180 days, Texas accounted for 240 citations with a 0.0% OOS rate. New Mexico followed with 5 citations (0.0% OOS), and Iowa with 2 citations (0.0% OOS).
The geographic concentration in Texas is pronounced — roughly 94% of all recent citations come from that single state, reflecting the volume of cross-border and long-haul traffic in that region. The consistency in OOS rates across states (all at 0.0%) indicates uniform enforcement treatment of this violation nationwide.
Among carriers cited repeatedly, our records show operations such as ECO TRANSPORTES INTERNACIONALES SA DE CV (USDOT 558117) with 6 citations and VRP TRANSPORTES DE MEXICO S DE RL DE CV (USDOT 662058) with 5 citations. The prevalence of international carriers and smaller owner-operators in the citation data suggests that vehicles operating longer routes or crossing international borders may face higher inspection scrutiny on retroreflective materials.
How severe is this compared to similar codes
In the vehicle maintenance category, 393.13C3 sits well below more frequently enforced violations. For comparison:
- 393.9 (Inoperable Required Lamp) has logged 180,097 citations with a 6.9% OOS rate — far more common and more likely to result in being placed out of service.
- 393.11 (Lighting Devices/Reflectors) totals 179,734 citations but only a 1.8% OOS rate, closer in severity to 393.13C3 but still enforced roughly 200 times more often.
- 393.78 (Windshield Condition Defective) has 157,894 citations with just a 0.3% OOS rate — comparable severity but dramatically higher enforcement frequency.
Your 393.13C3 citation is among the least frequently cited maintenance codes and has never resulted in an out-of-service placement in our dataset, placing it at the lower-severity end of roadside enforcement.
How to avoid it
Here are concrete steps to prevent a 393.13C3 citation:
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Conduct a pre-trip exterior walk-around focusing on the upper rear surfaces of your cargo area, trailer, or box. Look for gaps, peeling, or missing retroreflective tape or sheeting. The material should be firmly adhered and visible even in dim light when you shine a flashlight on it.
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Check your vehicle's manufacture date. If your truck or trailer was built before December 1, 1993, ensure retroreflective material is present. Vehicles built after that date have different reflector placement rules, so know what applies to your unit.
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Monitor for degradation. Retroreflective sheeting loses effectiveness over time due to weather, UV exposure, and road dirt. If you've had the same sheeting for several years, budget for replacement or touch-up work.
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Pair your reflective check with a lamp inspection. Our inspection data shows that 393.9 (inoperable lamps) co-occurs with 393.13C3 in 46 shared inspections over the last 90 days — nearly 42% of all 393.13C3 citations. If your reflective material is damaged, your lights may be too. Test all rear lamps during your pre-trip.
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Address brake and fuel system issues. Trucks cited for 393.13C3 frequently also show 393.45B2UV (brake tubing/hoses inadequate) in 32 shared inspections and 396.5B (fuel system leak) in 28 shared inspections. A thorough pre-trip that includes brake line condition and fuel system integrity reduces the likelihood of multiple citations.
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If you drive a Freightliner (FRHT), Kenworth (KW), or Utility (UTIL) – the top three makes in our citation data with 299, 126, and 93 citations respectively — be especially diligent. These popular long-haul chassis appear to receive more frequent inspection and may be subject to closer scrutiny by officers familiar with these models.
If you've already received a 393.13C3 citation, the good news is straightforward: because no vehicle has been placed out of service for this violation in our records, your citation is a correctable defect. Have the retroreflective material inspected and repaired or replaced by a qualified mechanic, document the repair, and proceed. The violation does not suspend your operating authority.