FMCSR 393.86B1: Rear End Protection (ICC Bumper) FAQ

No, not usually. Across our 13 million inspection records, 393.86B1 citations resulted in out-of-service placement only 1.2% of the time (2 OOS out of 166 all-time citations). For context, the national average OOS rate across all FMCSR codes is 31.4%, so this violation is treated as low-severity for roadside enforcement. You'll almost certainly be allowed to drive after the citation is issued.

This violation carries a severity weight of 5 in the CSA scoring system. The exact number of points you receive depends on your carrier's BASIC category weightings and the 30-day rolling window—multiple citations within 30 days stack differently than isolated ones. Ask your fleet manager or carrier safety contact for your specific CSA impact, as they track your moving violations score in real time.

First steps:

1. Document the defect — photograph the missing or damaged ICC bumper from multiple angles with date/time stamps.
2. Contact your carrier immediately — flag this for their maintenance and compliance teams.
3. Schedule repair — get the rear impact guard inspected and repaired or replaced by a qualified technician.
4. Check for co-occurring violations — our data shows 393.86B1 often appears alongside lighting defects (393.9) and inspection documentation issues (396.17C). Ask the inspector to clarify any other citations.
5. Request repair documentation — keep receipts and work orders to contest the citation if the defect wasn't driver-caused.

It's on the lower end of severity. With a 1.2% OOS rate, 393.86B1 is cited much less frequently and triggers roadside out-of-service far less than peer codes. For example, inoperable lamps (393.9) are cited 180,097 times in our database with a 6.9% OOS rate, and slack adjuster defects (393.47E) appear 180,363 times. By volume and enforcement, rear bumper defects are ranked #1275 out of 3,036 FMCSR codes—a relatively uncommon citation.

Yes, you can contest it. DataQs (Datagram) is FMCSA's online system for drivers and carriers to challenge inspection findings. For equipment defects like ICC bumpers, your best argument is:

• Pre-existing damage — evidence the bumper was already damaged before you operated the vehicle
• Repair in progress — proof you were in the process of repair when cited
• Inspection error — photographic evidence the bumper met specs

Submit your DataQs challenge within 60 days with clear documentation. Equipment findings are easier to contest if you can show the defect wasn't present or was immediately repaired.

Over the last 180 days, our inspection data shows:

• Texas: 36 citations (5.6% OOS rate)
• Illinois: 3 citations (0.0% OOS rate)
• Iowa: 1 citation (0.0% OOS rate)

Texas dominates this violation—likely due to higher commercial vehicle volume and waste/recycling operations. Republic Waste Services of Texas accounts for 6 of all-time citations in this code, suggesting certain industry verticals face more scrutiny on rear end protection.

Repair it within 30 days. While you won't be forced out of service at roadside, delayed repair creates risk. Over the last 90 days, we logged 21 citations for 393.86B1—a steady stream suggesting inspectors are checking bumper condition routinely. In October 2025, citations spiked to 15 in a single month, and again in March 2026 (11 citations), indicating seasonal enforcement cycles. Schedule repair immediately to avoid a repeat citation and further CSA point accumulation.

Both. The citation is recorded against your FMCSA profile and your carrier's safety record under CSA (Compliance, Safety, Accountability). Your carrier's out-of-service rate, inspection ratio, and BASIC categories all factor into their safety profile, which can affect insurance costs, shipper selection, and regulatory scrutiny. A single 393.86B1 won't destroy your record, but it counts toward your carrier's maintenance and equipment BASIC scores. Work with your fleet to fix defects before inspection and to contest citations that stem from pre-trip conditions you didn't cause.