What 393.86A2 means in plain language
FMCSR 393.86A2 addresses the rear impact guard commonly called an ICC bumper. This is the structural barrier mounted at the rear of your commercial motor vehicle. The regulation requires it to be present, in good working condition, and properly installed.
When an inspector cites you for 393.86A2, they found one of three issues: the bumper was completely missing from your truck, it was visibly damaged or cracked, or it was installed incorrectly—either loose, misaligned, or not secured to spec. The bumper exists to prevent smaller vehicles from sliding under your trailer during a rear-end collision, so inspectors treat its condition seriously from a safety standpoint.
You can be cited even if the damage is minor—a dent, rust that compromises structural integrity, or fasteners that have come loose all qualify. The bumper must meet the installed-to-spec standard, not just "present and somewhat functional."
What our enforcement data actually shows
Across 13 million inspections in our database, 393.86A2 has generated 176 all-time citations, with 92 citations in the last 12 months and 10 in the last 90 days. This code ranks #1249 of 3,036 FMCSR codes by citation volume—it is not commonly cited.
The out-of-service rate for 393.86A2 is 0.6% (1 out-of-service placement across 175 non-OOS citations). By contrast, the all-FMCSR average OOS rate is 31.4%. This means inspectors almost never place trucks out of service for this violation. You were cited, but your vehicle was almost certainly allowed to continue.
Our inspection records show the citation rate has been stable over the past 12 months, with a peak of 16 citations in June 2025 and a low of 3 in September 2025. The typical month sees 5–10 citations nationwide.
Who gets cited most
Over the last 180 days, citations for 393.86A2 concentrate in two states:
- Texas: 33 citations, 0 out-of-service placements (0.0% rate)
- Illinois: 1 citation, 0 out-of-service placements (0.0% rate)
Texas accounts for the vast majority of recent enforcement activity. The OOS rate is identical across these states (0%), so geography does not predict whether you will be placed out of service.
Our data shows fleets such as KB Custom AG Services LLC, VRP Transportes de Mexico S de RL de CV, and Antunez Trucking LLC with 3 citations each in our all-time records. These are not patterns of systemic non-compliance; they reflect the low overall citation volume for this code.
How severe is this compared to similar codes
Within the Vehicle Maintenance category, 393.86A2 is far less cited than closely related codes:
- 393.9 (Inoperable Required Lamp): 180,097 citations all-time, 6.9% OOS rate
- 393.11 (Lighting devices/reflectors): 179,734 citations all-time, 1.8% OOS rate
- 393.78 (Windshield condition defective): 157,894 citations all-time, 0.3% OOS rate
The reason 393.86A2 is cited so rarely is that most operators maintain their rear bumpers adequately. When it is cited, the OOS rate (0.6%) is lower than lighting-related codes (6.9%, 1.8%) and comparable to windshield defects (0.3%), suggesting inspectors view it as a repair-before-you-drive issue, not an immediate safety hazard that requires roadside shutdown.
How to avoid it
Prevention is straightforward because bumper damage and missing bumpers are visible during a pre-trip walk-around:
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Walk the rear of your truck before every shift. Look for cracks, rust that eats through the steel, loose fasteners, or obvious damage. If the bumper is bent or pushed out of alignment, address it before you roll.
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Check all fasteners and mounting points. Our inspection data shows coupling-device defects (393.55E) co-occur with bumper citations in 5 recent shared inspections, suggesting that vehicles with loose rear-end hardware may have multiple structural issues. Tighten or replace any bolts, welds, or brackets that are loose.
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Know your bumper height and alignment. A bumper that is too high, too low, or misaligned does not meet the installed-to-spec requirement. If your truck has been in a minor rear collision or you have recently had trailer work done, verify the bumper sits where it should.
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Address rust early. Surface rust is normal, but if you can see daylight through the bumper material or if chunks are missing, it is structurally compromised and will be cited. Small repairs now prevent citations and keep your truck safer.
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Keep maintenance records. Our data shows that "no proof of periodic inspection" (396.17C) co-occurs with 393.86A2 in 4 recent shared inspections. Document when you inspected and maintained your rear bumper. This does not prevent a citation, but it shows a pattern of care.
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Inspect your vehicle after any impact or repair. If you back into a dock, hit a pothole hard, or have coupling work done, walk the rear and confirm the bumper is still properly mounted and undamaged.
The 0.6% OOS rate tells you that if you are cited for 393.86A2, you will almost certainly be allowed to drive to a repair facility. But the best outcome is no citation at all, and a 30-second walk-around at the start of your shift catches 99% of bumper problems before an inspector does.