FMCSR 393.209B: Hub/Bearing Defective — Q&A

Not automatically, but there is a real chance. Across our inspection records, 393.209B resulted in an out-of-service order 41.9% of the time. That's 10.5 percentage points higher than the average across all FMCSR codes (31.4% OOS rate). Whether the officer places your truck OOS depends on the severity of the defect and the jurisdiction — but assume your hub or bearing issue will be examined closely during the roadside stop.

This violation carries a severity weight of 7 points. FMCSA applies a 30-day multiplier to your safety score based on how many violations you rack up in that window. A single 393.209B won't crater your record on its own, but if you're accumulating multiple citations, the points add up quickly. Your safety profile feeds into your carrier's CSA BASIC scores and your own driver record.

First, get a qualified mechanic to inspect your hub and bearing system as soon as possible — this defect can cause catastrophic failure on the road. Second, document the inspection and any repairs. Third, if you believe the citation is inaccurate, you can contest it through FMCSA's DataQs system (request records from the inspection agency and submit evidence). Fourth, notify your carrier immediately; they need to know about the citation for their own safety records and insurance.

Hub and bearing defects sit in the middle of the maintenance severity spectrum. Our data shows similar codes have very different OOS rates: Inoperable Required Lamp (393.9) at 6.9%, Slack Adjuster Defective (393.47E) at 0.0%, but general Inspection/Repair/Maintenance violations (396.3) at 45.3%. The 41.9% OOS rate for 393.209B suggests inspectors take bearing/hub issues seriously — they're structural failures waiting to happen — so treat this with urgency.

Over the last 180 days, our inspection records show Texas dominates the citation count with 75 citations (38.7% OOS rate), followed by North Carolina with 7 citations (14.3% OOS rate) and New Mexico with 3 citations (100% OOS rate). Texas accounts for the vast majority of 393.209B enforcement, so if you run that region regularly, be especially vigilant about hub and bearing maintenance.

Over the last 12 months, we've logged 185 citations for 393.209B nationwide. The monthly trend shows enforcement hovering between 14–23 citations per month, with October 2025 hitting the peak at 23 citations. There's no sharp upward spike, but consistent pressure — inspectors are catching this defect regularly. Stay on top of pre-trip hub and bearing inspections, especially if you operate older equipment.

Drivers cited for 393.209B often have other defects flagged in the same roadside stop. Our last 90 days show 393.209B co-occurs with Inoperable Required Lamp (393.9) 14 times, Fuel System Leak (396.5B) 12 times, and Windshield Defect (393.78) 10 times. This pattern suggests inspectors do comprehensive vehicle checks when they spot a hub or bearing issue. If you get this citation, expect the officer to have looked closely at lighting, fuel systems, and overall structural condition.

Yes. FMCSA's DataQs (Request for Data Review) system lets you challenge roadside inspection records. To contest a 393.209B, you would typically submit photographic or mechanic's evidence showing your hub and bearing were in acceptable condition at the time of inspection, or that the officer's notation was factually wrong. You have 90 days from the inspection to file. Contact the roadside inspection agency that issued the citation to request the full inspection report, then gather supporting documentation before submitting your challenge.