What 393.62-BEO means in plain language
Windshield wipers are a basic safety system, not optional equipment. FMCSR 393.62-BEO requires that the wipers on your commercial motor vehicle function properly and be present. If an inspector finds that one or both wipers are missing or do not operate correctly, you are in violation.
This isn't about having wipers available somewhere — it's about having them mounted on the windshield and in working order at the moment of inspection. A wiper that doesn't move, moves too slowly, leaves streaks or gaps, or is cracked enough to be ineffective all trigger this code. So does a missing wiper blade entirely.
The regulation exists because wipers directly affect your ability to see the road during rain, snow, or sleet. Poor visibility from failed wipers increases crash risk for you, your cargo, and everyone around you.
What our enforcement data actually shows
Across our 13 million+ inspection records, we have documented 79 all-time citations for 393.62-BEO, with 49 citations in the last 12 months and 11 in the last 90 days. This code ranks #1492 of 3,036 FMCSR codes by citation volume, making it relatively uncommon overall.
What stands out is how severely this violation is enforced. Our inspection records show that 74 of the 79 all-time citations for this code resulted in an out-of-service order — a 93.7% OOS rate. Compare that to the all-FMCSR average of 31.4%. Inspectors are treating inoperative wipers as a serious safety defect, not a minor maintenance issue. When officers cite 393.62-BEO, they almost always remove the vehicle from service immediately.
In the last 90 days, every single one of the 11 citations we recorded led to an out-of-service placement. Monthly trends over the past 12 months show activity ranging from 1 to 8 citations per month, with notable spikes in January and March 2026 (8 citations each) and peaks in May, August, and December 2025 (5 citations each).
Who gets cited most
Our data shows California leads all states with 13 citations in the last 180 days, and all 13 resulted in out-of-service orders (100% OOS rate). Pennsylvania follows with 3 citations but a notably lower out-of-service rate of 66.7% — only 2 of the 3 resulted in removal from service. Minnesota and West Virginia each recorded 2 citations, both at 100% OOS rates.
The variation between states is worth noting. Pennsylvania's 66.7% OOS rate stands apart from the consistent 100% rates in California, Minnesota, and West Virginia, suggesting enforcement philosophy may differ slightly by jurisdiction, though the overall trend is unmistakable: inoperative wipers almost always lead to being pulled out of service.
Among carriers, our data shows fleets such as First Student Inc with 9 all-time citations for this code, followed by Sacramento City Unified School District with 3 citations. This pattern reflects the high-mileage, high-exposure nature of large commercial fleets and school bus operators, who operate in all weather conditions and are subject to frequent inspections.
How severe is this compared to similar codes
Within the Vehicle Maintenance category, 393.62-BEO sits at an extreme end of the enforcement spectrum. The peer code 393.78 (Windshield condition defective) has generated 157,894 citations with only a 0.3% OOS rate — a stark contrast to 393.62-BEO's 93.7%. The reason is clear: a defective windshield surface may be correctable with repair; inoperative wipers indicate the vehicle cannot safely operate in wet or winter conditions and must be removed from service immediately.
Comparison to 393.9(a) (Inoperable required lamps) shows 660,737 citations with a 15.4% OOS rate. While lighting failures are far more common, they are less frequently treated as immediate out-of-service defects. Wipers, by contrast, are treated as a showstopper — if they don't work, the vehicle does not move.
Another peer code, 396.3(a)(1) (Inspection/repair/maintenance general), has 236,919 citations with a 45.3% OOS rate, still substantially lower than 393.62-BEO. The data indicates that windshield wiper failure is one of the few maintenance items inspectors will consistently use to immediately remove a vehicle from operation.
How to avoid it
Prevention is straightforward and begins before you leave the yard. Here are concrete actions you can take:
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Inspect both wipers during pre-trip. Before you start the engine, visually check both the driver and passenger side wipers for presence, cracks, and proper seating on the windshield. Push each blade gently — it should flex slightly but not bend excessively.
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Test wiper operation at the start of each shift. Turn on the wipers at low and high speed before you drive. Watch that they move smoothly across the full width of the windshield without chattering, missing sections, or leaving streaks. If either wiper seems slow or stuck, do not drive — repair it before departure.
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Keep replacement blades in the cab. Wiper blades wear out and can crack without warning, especially in cold or sunny climates. Carrying a spare set lets you replace a failed blade roadside before an inspection catches the defect.
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Check wiper fluid levels. While not directly 393.62-BEO, our inspection records show that operating a vehicle while ill or fatigued co-occurred with this code in recent months, suggesting fatigue or inattention to pre-trip checks is a risk factor. A full wiper fluid reservoir is a sign you've done your homework.
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Document wiper condition in your logbook or vehicle inspection report. If you notice a blade is beginning to wear, flag it immediately so maintenance can replace it. This creates a paper trail that shows you are actively monitoring the condition.
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Be especially vigilant in wet and winter months. Our data shows citations spike in January and March — heavy rain and snow seasons. Inspectors pay closer attention to wipers when weather is poor because the safety consequence is real.