393.207 Violation: What It Means and How to Fix It
Data through September 24, 2026 · Last updated October 28, 2026 · By Chad Griffith, founder
Quick Answer
393.207 (Suspension systems) was cited 14,648 times in roadside inspections of interstate for-hire carriers with 5 to 50 trucks from September 25, 2024 to September 24, 2026, and 58.2% of those citations put the driver or vehicle out of service. The most common version is 393.207A-SAPPCBLM: Suspension - Axle positioning part cracked/broken/loose/missing..
14,648
Citations on carriers with 5 to 50 trucks
58.2%
Out of service
69,125
All carriers, same period
What the rule says
Axles, axle positioning parts, springs and air suspension must be in place, unbroken and not leaking (49 CFR 393.207).
When it puts you out of service
Often out of service (58% here), because a broken axle positioning part or spring can let the axle move.
The codes on the inspection report
| Code | What the officer wrote | Severity weight | Citations, 5 to 50 trucks | Out of service |
|---|---|---|---|---|
| 393.207A-SAPPCBLM | “Suspension - Axle positioning part cracked/broken/loose/missing.” | 7 | 1,970 | 8.3% |
| 393.207F-SLAS | “Suspension - Leaking 3 PSI in 5 minutes” | 7 | 1,896 | 0.4% |
| 393.207F-SDAS | “Suspension - Deflated air suspension” | 7 | 1,755 | 95.3% |
| 393.207A-STBW | “Suspension - Suspension connecting rod or tracking component assembly missing the rubber bushing or the rubber bushing is worn to the extent that the component ca” | 7 | 1,301 | 89.8% |
| 393.207A | “Axle positioning parts defective/missing” | 7 | 1,121 | 82.5% |
| 393.207A-SAPPAS | “Suspension - Axle positioning part cracked/broken/loose/missing resulting in axle shift” | 7 | 1,075 | 96.2% |
| 393.207B-AALPME-OOS | “More than 25% of the locking pins are missing or not engaged” | 7 | 1,074 | 98.7% |
| 393.207A-STCB | “Suspension - Suspension connecting rod or tracking component assembly (including spring leaves used as a suspension connecting rod) or any part used for attaching” | 7 | 854 | 92.4% |
| 393.207B-AALPME | “Any of the locking pins are missing or not engaged.” | 7 | 839 | 2.5% |
| 393.207B | “Adjustable axle locking pins missing or not engaged” | 7 | 548 | 55.3% |
| 393.207F | “Air suspension pressure loss” | 7 | 536 | 34.5% |
| 393.207A-SUBL | “Suspension - U-bolt u-bolt bottom plate or other axle clamp bolt loose/cracked/broken/missing.” | 7 | 493 | 89.7% |
How it scores (violation points)
How it scores: in FMCSA's Safety Measurement System each violation counts its severity weight, plus 2 if it put the driver or vehicle out of service, times 3 in its first 6 months, 2 from 6 to 12 months, and 1 from 12 to 24 months. FMCSA has approved a simpler scale that is not live yet.
How to fix it
- Repair before the vehicle moves, and keep the work order.
- Inspect the same parts on the other axles of that combination.
Stop it happening again
- Check springs, U-bolts and air bags at every preventive maintenance service.
Challenging it in DataQs
Use DataQs (dataqs.fmcsa.dot.gov) only when the report is wrong: the wrong carrier or vehicle, a violation that did not happen, or a citation a court dismissed without a fine or found you not guilty of, which removes it from the Safety Measurement System; a conviction of a different charge lowers its weight to 1 (FMCSA adjudicated citations policy). Fixing the defect afterward is not a reason to remove it; keep the repair record instead.
FileFlo reads your public FMCSA record, lists every violation with the rule behind it, and keeps the driver and vehicle records that stop repeats.
Run it yourself: the Audit-Ready Setup, $499 through December 31, 2026, then $199 a month for up to 15 trucks. Or FileFlo runs it: $1,500 a month for up to 15 trucks, Setup included, and your first month back if you are not happy.
About these numbers
Counts are violations cited in roadside inspections used in FMCSA's Safety Measurement System from September 25, 2024 to September 24, 2026 (dataset 8mt8-2mdr on data.transportation.gov, October 2026 run). Carriers with 5 to 50 trucks means 66,936 active interstate for-hire carriers with 5 to 50 power units and more trucks than buses, based in the 50 states or DC, from FMCSA's census file. This is FileFlo's reading of public FMCSA data, not an FMCSA rating. Severity weights are the current SMS weights.