FMCSR 393.45 Brake Tubing/Hoses: Driver Q&A

Yes — and the odds are high. Across 44,396 all-time citations in our inspection records, 393.45 triggered an out-of-service order 27,525 times, producing a 62.0% OOS rate. That means roughly 6 out of every 10 drivers cited for inadequate brake tubing or hoses were parked on the spot. The national average OOS rate across all FMCSR codes is 31.4%, so 393.45 runs nearly twice that baseline. If an inspector flags worn, chafed, crimped, or otherwise damaged brake hoses, plan on not moving until the defect is repaired and the vehicle is released.

393.45 carries a severity weight of 7 on the CSA scoring scale. That base score is then multiplied depending on how recently the inspection occurred — violations within the last 6 months are weighted most heavily, with the multiplier stepping down as time passes. Because 393.45 falls under the Vehicle Maintenance BASIC, the points attach to both the driver's safety measurement and the carrier's BASIC percentile. A severity weight of 7 is on the higher end of the scale and, combined with a 62.0% OOS rate, signals that FMCSA treats brake hose condition as a serious safety risk, not a paperwork issue.

Get the brake hoses inspected and repaired before you move the truck. Here is the immediate checklist:

1. Do not drive if an OOS order was issued — 62.0% of 393.45 citations result in one.
2. Document the repair with a signed work order showing the specific hose or tubing replaced; you will need this for DataQs if you contest.
3. Check for co-occurring defects. Our inspection records show that in the last 90 days, 393.45 appeared alongside inoperable required lamps (393.9, 234 shared inspections), slack adjuster defects (393.47E, 129 shared inspections), and brake system pressure loss (396.3A1BL, 91 shared inspections). Have a technician look at the full brake system and lighting during the same repair visit.
4. Notify your fleet safety manager immediately so the citation is logged and the BASIC score impact is tracked.

Yes — it stands out sharply from most peers in the same category. Our inspection records show 393.45 ranks #71 out of 3,036 FMCSR codes by citation volume, with a 62.0% OOS rate. Compare that to other Vehicle Maintenance codes: inoperable required lamps (393.9) carries a 6.9% OOS rate across 180,097 citations, windshield condition defects (393.78) sit at 0.3% across 157,894 citations, and even the general inspection/repair code (396.3(a)(1)) lands at 45.3%. The only category peers that approach 393.45's OOS rate are brake-specific codes. Damaged brake tubing is treated as an immediate safety threat, not a fix-it-later paperwork problem.

It depends on the basis for the challenge. The FMCSA DataQs system (Request for Data Review, or RDR) lets drivers and carriers dispute roadside inspection findings they believe were recorded in error. For an equipment violation like 393.45, a successful challenge typically requires evidence that the cited condition did not actually exist — for example, a pre-trip inspection report from the same day, repair records showing the hoses were replaced before the inspection, or a second inspector's written re-examination. Pure disagreement with the inspector's judgment, without supporting documentation, rarely succeeds. Because 393.45 is an observable equipment defect rather than a missing document, the burden of proof is on you to show the hoses were in compliant condition at the time of inspection.

Texas is the clear enforcement leader by a wide margin. Looking at our inspection records over the last 180 days, the top states by citation count are:

• Texas: 1,412 citations — and an 86.3% OOS rate, the highest of any top state
• Illinois: 165 citations, 36.4% OOS rate
• New Mexico: 92 citations, 57.6% OOS rate

North Carolina (46 citations, 60.9% OOS) and Iowa (18 citations, 44.4% OOS) round out the top five. If your routes run through Texas or New Mexico, the combination of high citation volume and high OOS rates makes pre-trip brake hose inspection especially critical.

Do not wait. The 62.0% OOS rate means the most likely outcome of a future inspection with the same defect is being parked roadside. Beyond the immediate stop, the volume trend in our database confirms enforcement is not slowing: citations over the last 12 months totaled 3,523, with 835 in just the last 90 days. Monthly OOS counts have remained high — for example, February 2026 produced 310 out-of-service orders from 378 citations, and March 2026 produced 280 from 360. Inspectors are actively writing these. Scheduling a brake hose inspection at the next PM cycle rather than immediately is a gamble that, statistically, fails more than half the time.

It follows both you and your carrier. Under FMCSA's CSA system, a violation recorded at a roadside inspection is attributed to the driver's Safety Measurement System profile and to the carrier's Vehicle Maintenance BASIC simultaneously. The driver record travels with the individual — if you change employers, the inspection history tied to your CDL moves with you and can affect how a new carrier's BASIC scores are calculated during the period you drove for them. The carrier accumulates the citation under its own USDOT number. This dual attribution is why large fleets in our records — such as Swift Transportation (198 all-time citations) and J.B. Hunt (159 citations) — work hard to keep brake maintenance violations off inspection reports entirely.