FMCSR 172.332(a): Hazmat ID Number Missing – QA

Yes, but not automatically. Across our inspection records, 172.332(a) citations resulted in an out-of-service placement in 57.7% of cases (86 out of 149 all-time citations). That's significantly higher than the all-FMCSR average OOS rate of 31.4%, meaning inspectors are treating this as a serious defect. Whether your truck gets placed OOS depends on the inspector's judgment and the condition of your hazmat placards—specifically whether the required class or division identification number is missing or illegible.

This violation carries a CSA severity weight of 4. That weight applies to the Hazardous Materials BASIC in the CSA scoring system, and it counts against your carrier as well. The exact CSA points total in a 30-day period depends on how many times you're cited in that window, but a single 172.332(a) citation will add 4 severity points to your HM BASIC score. Multiple citations within 30 days compound that impact.

1. Do not move the vehicle if it's been placed out of service—wait for cleared repair.
2. Inspect all hazmat placards on your cargo immediately to confirm the class/division ID number (e.g., 3, 5.1, 8) is present and legible on each placard.
3. Request inspection photos from the officer to document exactly what was cited as missing.
4. Correct the placard if it's damaged, faded, or incomplete, then request re-inspection before moving.
5. Report to your carrier/dispatcher with the citation number and details.
6. File a DataQs challenge if you believe the citation is inaccurate (e.g., placard was present but hard to read under roadside conditions).

Yes. Among peer hazmat placarding codes in the same category, 172.332(a) sits in the middle-to-high range for OOS risk. For example, general loading/unloading violations (177.834A-HMC and 177.834(a)) trigger OOS 99.2% and 97.9% of the time, but 172.332(a)'s 57.7% OOS rate is still well above the all-FMCSR average of 31.4%. In contrast, placard deterioration (177.817(e)) is cited more often but results in OOS only 5.2% of the time, suggesting inspectors view a missing ID number as more critical than cosmetic wear.

Yes. DataQs allows drivers and carriers to challenge roadside inspection findings through the FMCSA's Data Quality and Dispute Resolution (RDR) process. For a 172.332(a) citation, focus on evidence that the class/division ID number was legible on the placard at the time of inspection—roadside lighting, camera angle, or placard wear can affect visibility. Submit photos, documentation of placard maintenance records, or sworn statements. FMCSA will review within 30 days. Note that DataQs challenges are most successful when you can prove documentation was correct or the inspector's observation was factually inaccurate, rather than arguing gray-area visibility.

Our records show 149 all-time citations for 172.332(a), but we do not have state-level distribution data in our database to identify the top 3 states. However, the violation is relatively rare overall—ranked #1305 out of 3,036 FMCSR codes by citation volume. It may cluster near ports, chemical hubs, and major interstate corridors where hazmat inspections are frequent, but specific state or region patterns are not evident in our aggregate data.

Urgent. Your truck likely will remain out of service until corrected, given the 57.7% OOS rate. In addition, there have been zero citations for 172.332(a) in the last 90 days and last 12 months in our database, which suggests either the violation is being caught and corrected at initial inspection, or carriers and drivers have largely eliminated it through compliance. That makes active enforcement appear low—but if you're cited, fix it before moving any hazmat. Placard compliance is non-negotiable in hazmat transport.

Both. The citation is recorded against your vehicle and license number (driver record), but it also appears on your carrier's safety record through the FMCSA's CSA system. The Hazardous Materials BASIC is monitored for both individual drivers and carriers. A pattern of hazmat violations across your company's fleet can trigger an audit or intervention from FMCSA. As a driver, this citation will remain on your record; if you move to a new carrier, your history follows you. Carriers use driver records to screen hires.