FMCSR 172.332(b): Hazmat Class ID Missing—What Happens Now

No—but it's uncommon when it does. Out of 12 all-time citations for 172.332(b) in our database, only 2 resulted in out-of-service placement, giving this violation a 16.7% OOS rate. That's significantly lower than the 31.4% average across all FMCSR codes, meaning inspectors typically don't immediately ground your vehicle for a missing hazmat class/division ID number on your placards. However, you'll still be cited and points assessed.

This violation carries a severity weight of 4, which multiplies your CSA score over a rolling 30-month period. The exact point calculation depends on your carrier's overall safety profile and when the violation falls within that window, but the weight of 4 places it in the moderate range for hazmat placarding violations. Your FMCSA CSA portal will show the exact point impact tied to this citation within days of issuance.

Immediate steps:

1. Document the placard. Take photos of the specific placard cited and note the date/time/location of the inspection.
2. Review your placards. Verify all hazmat loads display the required class or division identification number on each placard.
3. Contact your carrier's safety/compliance team. They manage your CSA record and DataQs contestation process.
4. Check the inspection report. Request the full roadside inspection report from the DOT officer; it will detail which placard(s) were deficient.
5. Correct the violation immediately. Ensure all future hazmat shipments have properly marked placards with visible, undamaged class/division numbers.

It's one of the least-cited hazmat violations. Across our 13 million inspections, 172.332(b) ranks #2132 out of 3,036 FMCSR codes by citation volume. By contrast, related placard violations like 177.817(a) (general placarding) generate 2,274 citations with a 75.1% OOS rate, and 172.502(a)(1) (placarding general requirements) produces 1,820 citations with an 18.5% OOS rate. With only 12 citations all-time and zero in the last 90 days, this violation is rare—suggesting most carriers comply with hazmat identification requirements.

Yes. FMCSA's DataQs (Correcting and Appealing Safety Records) portal allows you or your carrier to challenge inspection findings within a defined window. For equipment-based violations like missing or deficient placards, contestation success depends on documentary evidence: photos showing the placard was properly marked at the time of inspection, shipping papers, or third-party records. Gather all documentation from the shipment date immediately. Your carrier's compliance team typically manages the DataQs filing, so coordinate with them right away.

Our inspection records show only 12 citations for 172.332(b) in the entire all-time database, making state-level distribution unreliable for prediction. The violation is so infrequently cited that no state emerges as a consistent enforcement hotspot. This rarity suggests that hazmat carriers generally comply with class/division identification markings, or that inspectors cite the violation under related codes like 172.502(a)(1) (placarding general requirements) instead.

Fix it before your next hazmat load. While the 16.7% OOS rate means most citations don't result in immediate grounding, the zero citations in the last 90 days and only 12 all-time suggest enforcement is sporadic—which actually increases urgency. A second citation could escalate scrutiny on your profile. Correcting placard markings is straightforward: ensure every hazmat placard displays the required class or division ID number in clear, undamaged print. This is a compliance minimum that costs nothing to correct and prevents repeat citations.

CSA violations are recorded against both the driver and the carrier. A 172.332(b) citation appears on your personal driver record and your carrier's Safety Management Cycle profile, affecting both BASIC categories related to hazmat (Hazmat Compliance) and driver fitness. When you move to a new carrier, the violation stays on your driving record. Your new employer will see it during the Pre-Employment Screening Program (PSP) background check and may factor it into hiring and training decisions.