Violation code

393.75A3-ATIS

Tires - All others, leaking with inflation more than 50% of the maximum inflation pressure on tire equipped with ATIS

Vehicle Maintenance8Non-OOS· SMS Appendix A v3.20

393.75A3-ATIS is a Tires violation under 49 CFR §393.75A3-ATIS. It falls in the Vehicle Maintenance BASIC with a severity weight of 8/10. Nationally it was cited 6,147 times in the last five years, with an OOS rate of 22.4%.

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National roadside inspection stats

as of 9/20/2026

Inspections

5,900

that found this code

Violations

6,147

total written

OOS rate

22.4%

1,377 OOS

Source: FMCSA roadside inspection data (last 5 years). The OOS rate is the share of these violations that led the officer to mark the driver or vehicle out of service.

Violation group: Tires
Regulation §: 393.75A3-ATIS
Severity weight: 8
Used in SMS: Yes
Status: Active
Updated: 9/20/2026

Last updated September 2026

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Notes

DSMS: Y | Comment: Added in 3.19

What 393.75A3-ATIS means — and how to avoid it

In plain English

In plain terms, 393.75A3-ATIS is cited for tires - All others, leaking with inflation more than 50% of the maximum inflation pressure on tire equipped with ATIS. It falls under the FMCSA rules on parts and accessories needed for safe operation.

What the inspector checks

•Tread depth (4/32" steer, 2/32" others) and even wear
•Cuts, bulges, sidewall damage, or exposed cord/ply
•Proper inflation and matched duals
•Flat/audible-leak tires — an automatic out-of-service item

How to prevent it

✓Thump or gauge every tire on the pre-trip, including inside duals
✓Replace before tread hits the limit, not after
✓Keep a working gauge in the truck and correct low pressure immediately

How it affects your CSA

up to 24 pts (fresh)

Severity 8/10. A fresh citation counts at the 3× time weight — up to 24 points toward the Vehicle Maintenance BASIC — then tapers to 2× after 6 months and 1× after a year, dropping off the score at 24 months.

General guidance from the violation’s FMCSA classification — not legal advice, and not a substitute for the inspector’s findings or 49 CFR.

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Challenging 393.75A3-ATIS through FMCSA DataQs

If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Tires.

Relevant 49 CFR49 CFR § 393.75

Tires

“No motor vehicle shall be operated on any tire that has body ply or belt material exposed through the tread or sidewall, has any tread or sidewall separation, is flat or has an audible leak, or has a cut to the extent that the ply or belt material is exposed.”

Common ways to challenge this code

Tread measurement disputed
The tread depth measurement was taken at a worn point that is not representative, contrary to NHTSA/FMCSA measurement standards.
Evidence that wins
- ✓Independent tread gauge reading from same tire (multiple positions)
- ✓Photograph of the tire with a reference scale
Inflation context — recent stop or temperature
The under-inflation reading was taken immediately after a long-distance high-temperature run or before warm-up, not at the FMCSA standard measurement state.
Evidence that wins
- ✓Tire-pressure-monitoring system log (TPMS)
- ✓Service receipt showing inflation at start of trip

Common pitfalls — avoid these

⚠Inflation readings can't be challenged with a re-inflation done after the stop — must show original-state evidence

⚡ Draft a challenge for 393.75A3-ATIS →Read the DataQs guide first

More codes in Vehicle Maintenance

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Codes under the same FMCSA violation group

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Frequently asked questions about 393.75A3-ATIS

What does violation 393.75A3-ATIS mean?

393.75A3-ATIS is the FMCSA roadside-inspection violation code for "Tires - All others, leaking with inflation more than 50% of the maximum inflation pressure on tire equipped with ATIS", part of the Tires group, cited under 49 CFR §393.75A3-ATIS.

What BASIC does 393.75A3-ATIS affect?

393.75A3-ATIS falls under the Vehicle Maintenance BASIC in the FMCSA Safety Measurement System (SMS).

What is the CSA severity weight of 393.75A3-ATIS?

393.75A3-ATIS carries a severity weight of 8 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Vehicle Maintenance score.

Is 393.75A3-ATIS an out-of-service (OOS) violation?

No. 393.75A3-ATIS is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.

How many CSA points does 393.75A3-ATIS add to a carrier's score?

The point contribution of 393.75A3-ATIS depends on its severity weight (8/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.

How can a driver prevent 393.75A3-ATIS?

Thump or gauge every tire on the pre-trip, including inside duals; Replace before tread hits the limit, not after; Keep a working gauge in the truck and correct low pressure immediately.

Can 393.75A3-ATIS be challenged through DataQs?

Yes. If you believe 393.75A3-ATIS was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.

Keep going

CSA points calculator How to challenge a violation Draft a DataQs letter for 393.75A3-ATIS Vehicle Maintenance BASIC Carrier CSA lookup CSA glossary

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