393.86A4-RIG — Rear Impact Guards - Trailers and semitrailers manufactured on or after January 26, 1998 improper location.
FMCSA violation code under Vehicle Maintenance. 71 events recorded in roadside inspections. Severity weight: 2.
Violation code 393.86A4-RIG is a Federal Motor Carrier Safety Regulations citation issued under 49 CFR 393.86. It tracks a specific compliance failure recorded against motor carriers and drivers during FMCSA roadside inspections. The code rolls up into the FMCSA Safety Measurement System (SMS) Vehicle Maintenance BASIC, which feeds the carrier's percentile ranking and prioritization for FMCSA interventions. It applies to interstate motor carriers, drivers, and the commercial motor vehicles they operate; intrastate operators are subject when their state has adopted Part 350 of the FMCSR by reference. It carries a severity weight of 2, 71 citations have been recorded against this code in the FMCSA inspection record.
- Code:
- 393.86A4-RIG
- Code System:
- FMCSR
- BASIC Category:
- Vehicle Maintenance
- OOS Eligible:
- No
- Severity Weight:
- 2
- Violation Group:
- Cab Body Frame
- Total Events:
- 71
- Carriers Cited:
- 63
Ranks #1,547 of 3,146 FMCSR codes by citation frequency • OOS rate of 0.0% is below the FMCSR-wide average of 33.4%.
What 393.86A4-RIG means
Rear Impact Guards - Trailers and semitrailers manufactured on or after January 26, 1998 improper location.
This is a specific FMCSA dictionary variant of section 393.86; it is not interchangeable with the bare 393.86 catch-all code.
CSA/SMS severity weight 2 on FMCSA's 1–10 scale in the Vehicle Maintenance BASIC.
Not Out-of-Service eligible by itself; the citation still feeds the carrier's BASIC percentile when scored.
71 citations recorded in the FMCSA inspection mirror across 63 carriers.
Ranks #1,547 of 3,146 FMCSR codes by citation frequency.
Most cited recently in Iowa (2 events in the last 180 days).
How to use this code
CSA weight, OOS trigger, inspector focus, fix path, and DataQs — from published FMCSA fields and citation counts on this page
CSA / SMS weight
Severity weight 2 (1–10). Higher weights correlate more strongly with crash risk in FMCSA's published table. Rolls into the Vehicle Maintenance BASIC. SMS applies time weights (3× / 2× / 1×) over a 24-month window before ranking carriers by percentile.
OOS trigger
This code is not OOS-eligible by itself. It still appears on the inspection report and can move the carrier's BASIC percentile.
What inspectors typically check
FMCSR violations for brake defects, tire issues, lighting failures, frame damage, and other mechanical deficiencies.
- Brake condition, adjustment, and air-system integrity
- Tire tread/condition, lighting, and reflectors
- Frame, coupling, cargo securement, and other mechanical defects
Fix and prevent
- Correct the underlying condition and document the fix (date, work performed, who signed off).
- Catch it on pre-trip and scheduled PM before a roadside Level I/II does — brakes, tires, and lamps dominate this BASIC.
- Keep the correction in the compliance file — undocumented fixes look the same as non-compliance in a review.
DataQs challenge grounds
Carriers and drivers can file a Request for Data Review within 24 months when the record itself looks wrong. Common accepted grounds:
- Wrong violation code for the condition the inspector described
- Citation attributed to the wrong USDOT, driver, or unit
- Condition was already corrected / not present when the report was finalized
- Supporting evidence (photos, receipts, calibration, ELD extract) contradicts the citation
For brokers and shippers
Severity 2/10 — weigh frequency and recency on the carrier's inspection history, not a single old citation. Most-cited carrier in our table: DEFFENBAUGH INDUSTRIES INC (2 citations). 63 carriers have at least one 393.86A4-RIG citation in the mirror — open a carrier's inspection list to see whether this code is a pattern or a one-off.
Violation Description
Rear Impact Guards - Trailers and semitrailers manufactured on or after January 26, 1998 improper location.
Regulatory Reference
Federal Motor Carrier Safety Regulations
This violation references 49 CFR 393.86A4 in the Federal Motor Carrier Safety Regulations.
Top Enforcing States
Where 393.86A4-RIG is most commonly cited (last 180 days)
Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.
Citation Trend (12 months)
Monthly count of 393.86A4-RIG citations. Red bars mark months with OOS-triggering citations.
Most Active Stations
Inspection stations citing 393.86A4-RIG most often (last 180 days)
Top Carriers Cited
Ranked by frequency • 63 carriers total • Page 1 of 3
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | DEFFENBAUGH INDUSTRIES INC | 271225 | 2 |
| #2 | B&D TRUCKING EXPRESS LLC | 2941791 | 1 |
| #3 | POLVON LLC | 3097478 | 1 |
| #4 | SANCHEZ MOTOR PLEX LLC | 4155768 | 1 |
| #5 | SANDELL TRANSPORT INC | 1472364 | 1 |
| #6 | IHMUD TRUCKING LLC | 3782831 | 1 |
| #7 | SS UNITED INC | 3263513 | 1 |
| #8 | GREEN DRAGON TRUCKING INC | 3564133 | 1 |
| #9 | BALWANT SINGH MANGAT | 815265 | 1 |
| #10 | NATIONAL LOGISTICS LLC | 2922140 | 1 |
| #11 | MR BULT'S INC | 387102 | 1 |
| #12 | THUNDER CARGO INC | 2839142 | 1 |
| #13 | EVERGREEN TRANSPORT LLC | 1980141 | 1 |
| #14 | C&W TRUCKING & SONS INC | 1457229 | 1 |
| #15 | D G LOGISTICS LLC | 852587 | 1 |
| #16 | CORNERSTONE CARGO LLC | 1683159 | 1 |
| #17 | CANADIAN PRAIRIE TRANSPORT INC | 3519321 | 1 |
| #18 | LINCOLN EXPRESS INC | 3616799 | 1 |
| #19 | U S FREIGHT LINES INC | 1728812 | 1 |
| #20 | PKG EXPRESS INC | 733463 | 1 |
| #21 | KEEN CARGO INC | 2440672 | 1 |
| #22 | DENALI EXPRESS INC | 3738329 | 1 |
| #23 | BAALI TRUCKING LLC | 3866707 | 1 |
| #24 | AAA COOPER TRANSPORTATION | 92261 | 1 |
| #25 | DREW FOAM COMPANIES INC | 1601998 | 1 |
Recent Inspections
Latest inspections where 393.86A4-RIG was cited • 71 total events • Page 1 of 3
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| 88288394 | FL | Level 1 | No | |
| 88240071 | NV | Level 2 | No | |
| 88158872 | MI | Level 1 | No | |
| 88124869 | VA | Level 2 | No | |
| 88021693 | IA | Level 1 | No | |
| 88002808 | IA | Level 2 | No | |
| 87782679 | CA | Level 1 | No | |
| 87471991 | AZ | Level 2 | No | |
| 87400464 | PA | Level 2 | No | |
| 87336247 | CA | Level 2 | No | |
| 87320044 | WA | Level 2 | No | |
| 87275121 | PA | Level 2 | No | |
| 87133981 | TN | Level 1 | No | |
| 87037241 | MN | Level 1 | No | |
| 86831342 | GA | Level 2 | No | |
| 86830836 | GA | Level 1 | No | |
| 86805921 | OK | Level 1 | No | |
| 86829678 | MN | Level 1 | No | |
| 86754998 | GA | Level 2 | No | |
| 86623658 | WA | Level 2 | No | |
| 86625557 | MN | Level 1 | No | |
| 86531412 | CA | Level 1 | No | |
| 86432021 | GA | Level 2 | No | |
| 86349840 | ME | Level 2 | No | |
| 86348414 | MT | Level 1 | No |
How to comply with violation code 393.86A4-RIG
- Locate the regulation in the eCFR. Open https://www.ecfr.gov/current/title-49/section-393.86 on eCFR.gov to read the legal text the citation is written against. The eCFR is the National Archives' continuously updated electronic Code of Federal Regulations and is the canonical reference for any FMCSR section.
- Determine if your operation is subject. Confirm whether your operation is interstate (always subject to the FMCSR) or intrastate (subject when your state has adopted 49 CFR Part 350 by reference; most have). Intrastate operators in non-adopting states may be subject to a state analog instead of the federal rule.
- Identify the documented requirement. Read the requirement carefully: "Rear Impact Guards - Trailers and semitrailers manufactured on or after January 26, 1998 improper location." Map it to the specific equipment, driver document, or operational practice it covers.
- Inspect or maintain to standard. Build a recurring inspection, training, or filing routine that catches this gap before a roadside inspector does. Pre-trip checks, scheduled preventive maintenance, driver-qualification file audits, and supervisor reviews are the standard places this kind of issue is caught early.
- Document compliance to demonstrate it on review. Keep a dated, signed record of each inspection, repair, training session, or filing tied to 393.86A4-RIG. During an FMCSA compliance review or a customer onboarding audit, the documentation is what proves the program runs — undocumented compliance is indistinguishable from non-compliance to the auditor.
Frequently asked questions about 393.86A4-RIG
What is FMCSA violation code 393.86A4-RIG? ▾
Is 393.86A4-RIG an out-of-service violation? ▾
What's the severity weight of 393.86A4-RIG? ▾
How many inspections have cited 393.86A4-RIG? ▾
Which BASIC category is 393.86A4-RIG in? ▾
What does a carrier do to fix 393.86A4-RIG? ▾
Where can I find related violation codes? ▾
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About FMCSA violation codes
Every violation found during an FMCSA roadside inspection is recorded under a code drawn from the Federal Motor Carrier Safety Regulations — the codified safety rules motor carriers, drivers, and commercial motor vehicles must comply with in interstate commerce. Codes roll up into one of seven Behavior Analysis and Safety Improvement Categories (BASICs): Unsafe Driving, Hours-of-Service, Driver Fitness, Controlled Substances/Alcohol, Vehicle Maintenance, Hazardous Materials Compliance, and Crash Indicator. Each code carries a published severity weight (1–10) and an Out-of-Service eligibility flag.
Citations counted in the FMCSA Safety Measurement System (SMS) feed a 24-month rolling percentile rank for every motor carrier. Recent citations weigh more heavily than older ones — FMCSA applies a 3× multiplier to events 0–6 months old, 2× for 6–12 months, and 1× for 12–24 months. Carriers above the published intervention threshold for a given BASIC are prioritized for warning letters, focused investigations, and full compliance reviews.
TruckCodex mirrors the FMCSA Motor Carrier Management Information System (MCMIS) and the published violation dictionary on a daily refresh cycle. We do not author or modify violation records — every count, severity weight, and OOS flag on this page reflects what the FMCSA has on file. For real-time confirmation immediately before an enforcement decision, click through to the FMCSA Violations Search link above. Carriers who believe a citation was recorded in error can file a Request for Data Review through the FMCSA DataQs system.
Related Records
Data sources & freshness
TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.
Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
TruckCodex is an independent aggregator; it is not affiliated with FMCSA, NHTSA, EIA, or Transport Canada. Always verify compliance-critical information directly with the originating agency.