FMCSR 393.71(h) Fifth Wheel Defective: Citations & Consequences

Yes, there is a high risk. Across our inspection records, when a fifth wheel assembly is cited as defective, excessively worn, or improperly secured under 393.71(h), the truck is placed out of service 82.4% of the time. That is significantly higher than the all-FMCSR average out-of-service rate of 31.4%. In your specific case, an inspector's determination depends on whether the defect poses an immediate safety hazard or can be repaired before the next move. Do not operate the vehicle until the fifth wheel is repaired and re-inspected.

This violation carries a CSA severity weight of 8 points. The number of points that actually hit your record depends on when you were cited. FMCSA multiplies the base severity by a 30-day factor: if you received this citation in the past 30 days, the multiplier is 3× (so 24 points). If it was 31–60 days ago, it's 2× (16 points). Beyond 60 days, it's 1× (8 points). These points feed into the Vehicle Maintenance BASIC category on your CSA profile.

First: Stop operating the vehicle if you were placed out of service. Do not move it except to an authorized repair facility.

Second: Contact a DOT-certified mechanic or your carrier's maintenance team and have them inspect the fifth wheel assembly for defects, excessive wear, or improper securement.

Third: Get a written repair report documenting what was wrong and what was fixed.

Fourth: Request a post-repair inspection by a DOT inspector (available at most truck stops and certified facilities) to clear the out-of-service status.

Fifth: Keep all documentation for your records and CSA defense.

Yes, it is serious. Our database shows 393.71(h) has an 82.4% out-of-service rate, which means inspectors treat fifth wheel defects as an immediate safety risk in the vast majority of cases. By contrast, the similar-category code 393.47E (slack adjuster defective) shows a 0.0% out-of-service rate, and 393.78 (windshield condition) sits at just 0.3%. Fifth wheel integrity is critical to trailer coupling safety, which is why this violation triggers enforcement so aggressively when found.

Yes, you can file a DataQs (FMCSA Safety Data Online) dispute. The FMCSA allows drivers and carriers to challenge roadside inspection findings that are inaccurate or incorrectly coded. For a 393.71(h) citation based on a physical equipment defect, your contest is strongest if you can demonstrate the fifth wheel was not actually defective, was not excessively worn, or was properly secured at the time of inspection. Bring photos, maintenance records, and inspection reports. Document exactly what the inspector cited and prove it was incorrect or already repaired. Submit your dispute within the DataQs window (timelines vary by state; check your citation notice).

Across our 13 million inspection records, 393.71(h) citations have dropped to nearly zero in active enforcement. All-time, we have 108 total citations for this code. In the last 12 months, there were 0 citations, and in the last 90 days, 0 citations. This code ranks #1395 out of 3,036 FMCSR codes by citation volume. The rarity does not mean the violation is not serious—it likely reflects that fifth wheel defects are either being caught in pre-trip inspections and fixed before roadside stops, or inspectors are citing related but more common suspension codes instead.

Extremely urgent. First, if you were placed out of service (82.4% of citations), you cannot legally operate until the defect is repaired and cleared by a post-repair inspection. Second, a defective fifth wheel coupling poses a catastrophic safety risk: trailer separation or misalignment can cause loss of control, jackknife, or rollover. Third, delaying repair exposes your carrier and you to liability in the event of a crash. Get the repair scheduled within 24 hours and completed before your next load.

According to our inspection database, Ford leads with 10 citations for 393.71(h), followed by Freightliner with 7 citations and Freightliner Heavy Duty with 5 citations. Hino, Kenworth, and International each have 4 citations. Volvo has 3. However, these numbers reflect total citations across millions of inspections; they do not mean these makes are inherently defective. Fifth wheel wear and defects occur across all vehicle types and are tied more closely to age, load history, and maintenance schedule than to manufacturer.