What 393.86A1 means in plain language
Your citation for 393.86A1 refers to the rear impact guard on your truck, commonly called an ICC bumper. This is the metal structure mounted to the rear of your vehicle that's designed to protect other vehicles in a rear-impact crash by keeping them from sliding underneath your trailer.
An inspector flags this violation when the bumper is missing entirely, damaged (bent, cracked, or bent out of shape), or installed incorrectly. "Improperly installed" means it doesn't meet the height, strength, or attachment requirements the regulation sets. Even a bumper that's loose, cracked, or hanging isn't acceptable—it has to be intact and secure.
This is a vehicle-maintenance issue, not a driver-conduct or logbook violation. It's a defect that stays with the vehicle until it's fixed, so you may not be able to move the truck until your carrier repairs or replaces the bumper.
What our enforcement data actually shows
Across our 13 million+ inspection records, 393.86A1 citations are relatively uncommon. Our database shows 270 all-time citations for this code, ranking it #1124 of 3,036 FMCSR codes by volume. In the last 12 months, we recorded 163 citations, and in the last 90 days, 38 citations.
The good news: this code has an extremely low out-of-service rate. Out of 270 all-time citations in our data, only 2 vehicles were placed out of service—a 0.7% OOS rate. Compare that to the all-FMCSR average of 31.4%. That means inspectors almost never remove your truck from service for a defective ICC bumper alone, though you will still be cited and required to repair it.
The monthly trend over the last 12 months shows citation counts averaging around 13 per month, with a peak in May 2025 (22 citations) and a low point in September 2025 (3 citations).
Who gets cited most
Our inspection records show 393.86A1 citations are heavily concentrated in three states. Texas leads by a wide margin with 56 citations in the last 180 days, followed by Illinois with 8 citations, and Iowa with 7 citations. All three states show a 0.0% OOS rate for this violation, consistent with the national pattern.
Among carriers, our data shows fleets such as Select Dedicated Solutions LLC (USDOT 1877140) with 4 citations and Jose Alonso Sarmiento Torres (USDOT 2289992) with 3 citations appearing most frequently in our records. This does not imply systemic negligence, only that these carriers' vehicles have been inspected more often or that their fleet composition puts them in higher-inspection jurisdictions.
How severe is this compared to similar codes
In the Vehicle Maintenance category, 393.86A1 sits on the lower end of enforcement volume and severity. For context, consider these related codes from our database:
- 393.9 (Inoperable Required Lamp): 660,737 citations with a 15.4% OOS rate—over 2,400 times more common than 393.86A1, and inspectors place vehicles out of service far more often.
- 393.78 (Windshield condition defective): 157,894 citations with a 0.3% OOS rate—also much more frequent, though with a similarly low OOS rate.
- 393.11 (Lighting devices/reflectors): 179,734 citations with a 1.8% OOS rate—another high-volume code with slightly higher OOS enforcement.
The fact that 393.86A1 ranks so low in citation volume and has virtually zero OOS enforcement suggests it is either caught less often by inspectors, is rarer as a defect in the field, or both.
How to avoid it
Prevent a 393.86A1 citation with these concrete actions:
- Pre-trip walk-around: Check your rear bumper every morning. Walk to the back of your trailer, visually inspect the entire ICC bumper for bends, cracks, rust-through holes, or separation from the frame. Run your hand along seams and attachment points to feel for looseness.
- Know your vehicle's condition: If your truck has an older bumper or one that was previously hit, flag it to your dispatcher or maintenance team before you go on the road. Don't wait for an inspector to find it.
- Check attachment bolts and welds: A bumper that's pulling away from the trailer frame will fail inspection. Make sure all bolts are tight and any welded connections are intact with no visible cracks.
- Watch for co-occurring brake and lighting issues: Our data shows that inspections citing 393.86A1 often also cite inoperable lamps (393.9) and brake issues (393.45B2UV). This suggests comprehensive vehicle inspections. Do a full brake check (lines, hoses, slack adjusters) and test all required lights—marker lights, stop lamps, and reflectors—at the same time.
- Report maintenance needs quickly: If you notice damage during your pre-trip, report it immediately to your carrier's maintenance team. A bumper repair typically takes one to two days; waiting until an inspector catches it can cost you time and a violation on your record.
- Vehicle type awareness: Our enforcement data shows Freightliner (FMHT) vehicles have 104 citations for this code, followed by Wabash (WANC) with 59 and Utility (UTIL) with 48. If you drive one of these makes, pay extra attention to bumper condition—they may see higher inspection rates or the bumper design may be more prone to damage in these models.
The bottom line: this is a straightforward vehicle maintenance defect with low enforcement severity but high visibility during an inspection. Regular pre-trip checks and prompt reporting of damage will keep you clear of this violation.