FMCSR 393.11(c) — Lighting & Reflectors Q&A

No. Across our inspection records, the 0.0% out-of-service rate for 393.11(c) citations means this violation does not trigger an immediate OOS order. For context, the national average OOS rate across all FMCSR codes is 31.4%, so lighting and reflector defects are treated as citation-only violations rather than safety emergencies that ground your vehicle.

This violation carries a CSA severity weight of 3. Under the FMCSA Safety Management Guidelines, that weight is applied to the inspection that recorded the violation. If you received this citation in the last 12 months, those 3 points count toward your carrier's CSA percentile and any compliance review if triggered. The actual CSA point total depends on the 30-day violation window and your carrier's other citations.

First: photograph the cited lighting or reflector condition and document the inspection details. Second: have your fleet maintenance team or a certified technician inspect and repair the affected lights or reflectors immediately—don't wait. Third: obtain a repair receipt or maintenance record showing the work was completed. Fourth: keep that documentation in your vehicle file in case the citation is audited or challenged later. Even though this violation won't ground your truck, delayed repairs can lead to repeat citations.

No—393.11(c) is less serious than the broader 393.11 category (1.8% OOS rate) and far less serious than 393.9(a) for inoperable required lamps, which has a 15.4% OOS rate. Our database shows 34 all-time 393.11(c) citations, placing it at rank #1746 of 3,036 FMCSR codes. It's a low-volume, non-OOS violation. However, repairs are still mandatory and should be done promptly to avoid repeat findings.

Yes. The FMCSA DataQs system allows you to challenge roadside inspection records, including equipment findings like lighting defects. Your appeal should focus on whether the inspector correctly identified the defect—for example, whether the light or reflector was actually missing or inadequate at the time of inspection. DataQs cannot overturn a citation based on repairs done after the inspection, but it can remove or correct inaccurate findings. File your challenge within 90 days of the inspection.

Very urgent. While 393.11(c) has a 0.0% out-of-service rate, our records show zero citations in the last 90 days and none in the last 12 months, suggesting inspectors cite this violation only in clear-cut cases. That means if you were cited, the defect was significant enough to warrant enforcement. Repair immediately to avoid a second citation, which would compound CSA points and could trigger regulatory scrutiny of your maintenance program.

Freightliner trucks lead with 5 citations, followed by Chevrolet, Volvo, and International with 4 each, and Peterbilt with 3. These totals are all-time figures from our 13 million+ inspection records. If you operate one of these makes, pay extra attention to your lighting system during pre-trip and maintenance inspections. Defects in reflectors and lights on heavy-duty trucks are more visible to inspectors and more likely to be cited.

Both. Under FMCSA CSA scoring rules, violations attach to the carrier's USDOT number and appear in the carrier's safety profile. However, they also appear in your Motor Carrier Safety Report if you are the named operator or driver of record. Your carrier's safety rating, inspection frequency, and audit risk may be affected if violations accumulate. Always inform your fleet safety manager of any citation so your carrier can document the repair and track compliance trends.