FMCSR 393.203(d) — Cab Seats Not Securely Mounted

No. Across our 13 million inspection records, 393.203(d) citations result in out-of-service placement only 1.4% of the time. Of the 139 all-time citations we have for this code, only 2 were placed out of service and 137 were not. This is significantly more lenient than the all-FMCSR average OOS rate of 31.4%, meaning inspectors treat cab seat mounting issues as correctable rather than immediately disqualifying.

It's one of the least serious in the vehicle maintenance category. Our data shows 393.203(d) ranks #1333 of 3,036 FMCSR codes by citation volume with only 139 all-time citations. Compare that to peer codes: 393.9(a) has 660,737 citations with a 15.4% OOS rate, and 396.3(a)(1) has 236,919 citations with a 45.3% OOS rate. The low citation count and 1.4% OOS rate indicate this violation is uncommon and rarely results in vehicle impoundment.

First, document the exact mounting issue noted on the citation. Inspect all cab seats—driver, passenger, jump seats—to confirm attachment points and bolts. Second, have a certified mechanic or technician re-secure any loose mounts using the manufacturer's specifications. Keep the repair invoice and photos of the corrected work. Third, if you dispute the finding, you can submit a DataQs (FMCSA's Roadside Data Quality System) challenge within 90 days with documentation showing the seats were properly secured at the time of inspection. Otherwise, correct and keep records for your next audit.

The data provided does not include severity weights or point values assigned to this code by FMCSA's Compliance, Safety, Accountability program. CSA point totals depend on the violation severity level and the 30-day rolling-window multiplier in effect when your citation was issued. Contact your carrier's safety department or request your CSA profile directly from FMCSA to confirm the exact points attributed to your specific citation.

You're unlucky, but not exceptionally so. Our inspection records show zero citations for 393.203(d) in the last 90 days and zero in the last 12 months—despite covering 13 million roadside inspections. The 139 all-time citations span multiple years, indicating this is an infrequent finding. However, it does occur: Classic Charter Inc has been cited 3 times and Sika & Kofi Truck Moving LLC twice, suggesting certain operations or fleets may face higher scrutiny on seat mounting compliance.

Yes. FMCSA's DataQs system allows drivers and carriers to challenge citation accuracy and completeness within 90 days of the roadside inspection. For a 393.203(d) finding, your challenge should include photographic evidence, mechanic's reports, or maintenance records proving the seats were securely mounted at the time of inspection. Since this is an equipment-condition code (not a documentation-only violation), physical evidence of proper mounting is your strongest defense. Submit your documentation through the DataQs portal at FMCSA.dot.gov.

Freightliner models lead the list in our database, accounting for 10 citations, followed by Freightshaker with 12 citations and Kenworth with 7. Ford, Mack, and International each have between 4 and 5 citations. The variation likely reflects fleet composition and mileage rather than design defect—vehicles in high-utilization fleets accumulate more wear on mounting hardware, making regular inspection and re-torquing essential preventive maintenance.

Moderately urgent. While the 1.4% OOS rate means you won't face immediate impoundment, loose cab seats are a safety issue—they can shift during hard braking or impact, creating injury risk for drivers and passengers. The zero citations in the past 90 days and 12 months suggest low enforcement frequency, but a competent roadside inspector will cite it again if seats remain loose. Repair it within 1–2 weeks to eliminate the defect, reduce re-citation risk, and ensure occupant safety during operation.