What 393.207A means in plain language
When an inspector cites you under 393.207A, they've found a problem with your vehicle's suspension system. That could be a broken or missing leaf spring, a failed U-bolt, or any other suspension component that isn't doing its job. The rule covers the entire suspension assembly — not just one specific part — so inspectors have broad authority to flag whatever they find wrong under the chassis.
This matters for safety in an obvious way: suspension components keep your axles aligned, distribute load across tires, and absorb road shock. When those components are compromised, handling, braking distances, and tire wear all degrade. An inspector who spots a cracked spring pack or a missing U-bolt during a Level I or Level II inspection is almost certainly going to document it.
It's worth being clear that 393.207A is not OOS-eligible by regulatory default, meaning a citation alone doesn't automatically ground your truck. However, as you'll see in the data below, actual practice at the roadside tells a more complicated story.
What our enforcement data actually shows
Across our database of 13 million+ inspections, 393.207A has accumulated 11,228 all-time citations, putting it at rank #214 out of 3,036 FMCSR codes by citation volume — firmly in the top 10% of all codes for enforcement activity. In the last 12 months alone, our records show 7,488 citations, and in just the last 90 days, 1,824 more have been logged.
Here's the number that should get your attention: the all-time out-of-service rate for 393.207A is 65.0%. Of the 11,228 total citations in our database, 7,302 resulted in the vehicle being placed out of service. That is more than double the all-FMCSR average OOS rate of 31.4%. So while the regulation is technically not OOS-eligible on its face, inspectors are placing vehicles out of service under this code at a rate that vastly exceeds the norm across all federal motor carrier safety regulations.
Looking at the monthly trend over the past year, citations have been consistently high. Our inspection records show volumes ranging from 530 citations in June 2025 to a peak of 840 in February 2026, with OOS placements tracking closely alongside — 518 vehicles placed out of service in that February peak alone. The data shows no meaningful seasonal dip; this code is being actively enforced year-round.
The CSA severity weight assigned to 393.207A is 7, which means every citation feeds into your Safety Measurement System score with meaningful weight. Even if you drove away, this violation is sitting in your record and working against your carrier's BASIC scores.
Who gets cited most
Looking at the last 180 days in our database, Texas dominates enforcement volume for 393.207A by a wide margin — 3,494 citations with 2,266 resulting in OOS placements, a 64.9% OOS rate. North Carolina comes in second with 130 citations and a dramatically higher OOS rate of 93.1%, meaning inspectors there placed nearly every cited vehicle out of service. Illinois rounds out the top three with 52 citations and an 80.8% OOS rate.
The variation between these states is material and worth understanding. Texas is a high-volume enforcement state and its OOS rate of 64.9% roughly matches the national average for this code. But in North Carolina, the 93.1% OOS rate — more than 28 percentage points higher than Texas — suggests inspectors there are citing this violation primarily when the suspension defect is severe enough to warrant immediate action. New Mexico (86.1%) and Iowa (84.2%) follow a similar pattern. If you're running through any of these states, the likelihood that a 393.207A citation ends your day is substantially higher than the national average already suggests.
Our data shows fleets such as EVANS DELIVERY COMPANY INC (USDOT 38111) with 34 all-time citations and ACME TRUCK LINE INC (USDOT 52767) with 31 citations appearing at the top of the carrier list for this code. These numbers reflect the inspection exposure that comes with high-mileage, heavy-haul operations.
How severe is this compared to similar codes
To put 393.207A in context, compare it to peer codes in the Vehicle Maintenance category. The code 393.9(a), covering inoperable required lamps, has 660,737 all-time citations in our database — roughly 59 times the volume of 393.207A — but carries only a 15.4% OOS rate. That's less than a quarter of the 65.0% OOS rate on suspension defects. The citation counts are incomparable, but the consequence of being placed out of service is dramatically more likely under 393.207A.
Look at 396.3(a)(1), the general inspection, repair, and maintenance code, which has 236,919 citations and a 45.3% OOS rate. That rate is elevated compared to most Vehicle Maintenance codes, but still 19.7 percentage points below 393.207A's 65.0%. Then consider 393.47E, slack adjuster defective, with 180,363 citations and a 0.0% OOS rate in our records — a high-volume brake code where inspectors essentially never park the vehicle. Suspension defects under 393.207A result in OOS placements at a rate that stands apart from nearly every comparable Vehicle Maintenance code in the category.
How to avoid it
Our inspection records show 393.207A rarely appears alone. The co-occurrence data from the last 90 days points to specific areas where your pre-trip needs to be thorough:
- Check every visible suspension component under the trailer and tractor. Look for cracked, shifted, or missing leaf spring leaves. A broken center bolt or missing U-bolt on a spring pack is exactly what generates a 393.207A citation. Don't just glance — get eyes on the clamps and hardware.
- Inspect your brake system components at the same time. Our data shows 393.45B2UV (brake tubing and hoses) appeared in 333 of the same inspections as 393.207A in the last 90 days, and 393.47E (slack adjuster defective) appeared in 287. These aren't coincidences — they share the same inspection zone under the chassis. If you're walking the axles for suspension, check brake hardware simultaneously.
- Look for fuel system leaks while you're underneath. 396.5B (fuel system leak) appeared in 296 shared inspections with 393.207A in the last 90 days. A pre-trip that covers the suspension also needs to sweep for any fuel line or tank issues near the frame rails.
- Freightliner and Kenworth operators, pay particular attention. Our database shows FRHT-make vehicles with 3,471 all-time citations under this code, and KW with 1,794 — the top two vehicle makes cited by a significant margin. If you're in one of these cabs, your suspension components are statistically well-represented in enforcement data.
- Check your lamps before you roll. 393.9 (inoperable required lamp) appeared in 540 shared inspections with 393.207A in the last 90 days — the most common co-occurring code by count. An inspector who walks up to your truck for a lamp violation is going to look at everything else. Don't give them a reason to get under the chassis by failing the most visible part of a pre-trip first.
- Verify your periodic inspection documentation is on the truck. 396.17C (no proof of periodic inspection) appeared in 195 shared inspections with 393.207A. A missing inspection sticker or paperwork escalates an already expensive stop into multiple violations.