FMCSR 393.17(b): Lamps & Reflectors — Driver Q&A

Yes—very likely. Across our inspection records, 93.2% of 393.17(b) citations resulted in an out-of-service order. That's far above the 31.4% average OOS rate across all FMCSR codes. If an inspector finds your lamps or reflectors don't meet federal requirements, expect to be sidelined until repairs are made and re-inspected.

This violation carries a severity weight of 3, which is converted to CSA points using a 30-day multiplier. The exact CSA point total depends on whether you accumulate multiple citations in a rolling 30-day window—each additional citation multiplies the base weight. One citation = 3 points; two within 30 days = 6 points, and so on. Check your FMCSA Safety Management System (SMS) profile for your current total.

1. Stop operating that vehicle immediately if it's still out of service.
2. Identify the defect: Review the inspection report—which lamps or reflectors failed? (e.g., missing, cracked, improper color, insufficient brightness).
3. Get it fixed: Contact a certified repair facility and request documentation of the repair.
4. Request reinspection: Once repaired, have a CVSA-certified inspector verify compliance before you resume service.
5. Keep records: Save all repair receipts and reinspection documentation for future audits and DataQs appeals if needed.

Yes—it's significantly more serious than related lighting violations. Our data shows 393.17(b) has a 93.2% OOS rate, compared to 393.9(a) (inoperable required lamps) at 15.4% OOS and 393.11 (lighting devices/reflectors) at 1.8% OOS. The high OOS rate reflects that inadequate lamps and reflectors pose immediate safety risks. It ranks #598 of 3,036 FMCSR codes by citation volume, but the enforcement consequence is steep when it's issued.

Yes. If you believe the citation is factually incorrect—for example, the inspector misidentified your vehicle, failed to follow proper testing procedures, or the lights actually met spec—you can file a DataQs (Dispute Resolution) request through FMCSA's online portal within 90 days of the citation. Equipment-based findings (lamps and reflectors are objective hardware) are contestable if you have evidence the defect didn't exist or the inspection was flawed. Gather photos, repair receipts, and witness statements to support your case.

Extremely urgent. You cannot legally operate that vehicle once cited—the 93.2% OOS rate means your truck will be off the road until repaired and reinspected. Additionally, there have been 0 citations in the last 90 days in our database, suggesting enforcement of this violation is concentrated on high-risk carriers and vehicles, making compliance critical. Any delay extends your downtime and revenue loss. Prioritize the repair within 24–48 hours if possible.

Under this regulation, your vehicle's lamps and reflectors must meet all federal specifications: correct color, brightness, position, and operational status. Common failures include missing lamps, cracks that reduce light output, wrong bulb wattage, improper mounting, or reflectors that are worn or discolored. The rule covers all required lamps (headlights, taillights, brake lights, turn signals, clearance lights, marker lights, reflectors) on any commercial motor vehicle. If any required lamp or reflector doesn't function or isn't visible, you're in violation.

Towing, recovery, and event-response fleets dominate the citation data. COPART Catastrophe Response Fleet LLC (USDOT 2869944) leads with 27 citations, followed by several towing operators: Ketterle & Sons Inc, Cha Cha Express Inc, and Jon Hall Chevrolet Inc, each with 8 citations. If your carrier operates recovery or roadside response vehicles, lamp and reflector compliance should be a top-tier safety audit priority, as these vehicle types are cited far more frequently than standard freight haulers.