393.51(b) Steering Wheel Free Play: Citations & Compliance

Yes. Across our 13 million inspection records, every single citation for 393.51(b) resulted in an out-of-service order—a 100% OOS rate. This is significantly stricter than the all-FMCSR average of 31.4%, which means inspectors are treating excessive steering wheel free play as an immediate safety failure rather than a warning or repair ticket. You cannot legally operate the vehicle until the steering system is corrected and re-inspected.

This violation carries a CSA severity weight of 6 points. Your total CSA impact depends on how many times you're cited within a 30-day rolling window—each citation within that period stacks. A single citation adds 6 points to your Driver Vehicle Inspection Report (DVIR) BASIC. If you receive multiple citations in 30 days, the point total multiplies. This is a mid-range severity: not the highest on the scale, but substantial enough to flag your safety profile if repeated.

First, do not drive the vehicle in commerce. You are out of service. Here's your action plan:

1. Contact a certified mechanic or dealership immediately—steering system repairs are complex and must be done by qualified technicians.
2. Document all repair work (invoice, parts receipts, technician certification).
3. Schedule a follow-up Level 1 roadside inspection with a CVSA-certified inspector to verify the repair.
4. Keep the repair documentation on file for at least 12 months.
5. Review your vehicle maintenance logs to understand how the free play developed (worn columns, bent shafts, loose linkage all cause this).

Do not attempt DIY repairs on steering components.

Yes, it's treated as immediately serious. Our data shows 393.51(b) has a 100% out-of-service rate—far above the 31.4% average across all FMCSR codes. For context, related vehicle maintenance violations like 393.78 (windshield defects) show only a 0.3% OOS rate, and 393.11 (lighting) sits at 1.8% OOS. This tells you that inspectors view excessive steering wheel free play as a critical safety defect requiring immediate removal from service, not a minor maintenance item.

You can file a DataQs (FMCSA Datafile Quality Reporting System) challenge if you believe the citation was issued in error—for example, if the inspection was improperly documented or the vehicle was already repaired at the time of inspection. However, this is an equipment-based violation, not a documentation error, so your challenge succeeds only if you can prove the steering system actually met specifications or the inspector failed to follow proper measurement procedures. Most challenges are unsuccessful for physical defects. Consult your safety manager or a compliance professional to assess your case before filing.

Zero citations in the last 12 months and zero in the last 90 days, according to our 13 million inspection database as of April 2026. All-time, we have recorded 93 citations for 393.51(b) since records began. This extremely low recent volume suggests either improved steering system maintenance across the industry or that this specific defect is relatively rare in current vehicle populations. The violation remains on the books and is still enforceable, but you're statistically unlikely to see it cited today.

Our inspection data shows ISUZU leading with 24 citations for excessive steering wheel free play, followed by FORD (19 citations), INTERNATIO (13 citations), CHEVROLET (12 citations), and GMC (10 citations). These represent all-time totals across our database. The concentration in light-to-medium duty vehicles and older commercial trucks suggests steering column wear is more prevalent in these platforms. If you operate one of these makes, prioritize regular steering system inspections as part of your preventive maintenance routine.

This violation is recorded against both the driver and the carrier in the FMCSA's CSA system. The citation impacts your Driver BASIC and the carrier's Vehicle Maintenance BASIC. From a carrier perspective, multiple 393.51(b) citations signal inadequate pre-trip inspection protocols or vehicle maintenance management. From a driver perspective, it can affect your PSP (Pre-employment Screening Program) record and your safety profile with future employers. Both parties have a financial and compliance interest in preventing recurrence.