The Vehicle Maintenance score, in plain words

What counts. Lights, brakes, tires, steering, suspension, coupling — every physical defect an inspector can find on the walk-around. This is the volume category: the most inspections, the most violations, and the most total points in the federal file, by a wide margin.

The line. FMCSA's intervention threshold for this category is the 80th percentile — at or over it, the category is flagged for enforcement attention, and it is the flag brokers' policies key on. (In FMCSA's current public files, the alert on a carrier's own record is the operative signal — your report card reads it straight from the file.)

Why it matters. Vehicle Maintenance is won in the parking lot, not at the scale. Nearly all of its top violations are visible on a five-minute pre-trip walk — inoperative lamps are the single most common point source in the entire system. A carrier's out-of-service rate lives here too, and brokers read that rate as the company's maintenance culture in one number.

The violations that feed it most

From the current FMCSA violation file, ranked by total severity:

How the measure is built

The measure is built almost entirely from roadside and scale-house inspections: every defect written, weighted by severity (out-of-service defects weigh most) and time, divided by vehicle inspections. Because nearly every inspection looks at the truck, this category collects more violations than any other — volume is its nature.

What brokers do with this number

Brokers treat Vehicle Maintenance as the reliability score: trucks that fail inspections are trucks that break down under loads. A high out-of-service rate in this category is read as 'this load may not arrive,' and capacity teams would rather pay more for a boring carrier than explain a service failure. This is also the score shippers' vendor audits ask for by name.

What a bad month looks like

A tractor with a dead marker lamp, two tires at the wear limit, and a brake out of adjustment can collect a dozen violations in one Level 1 inspection — several of them out-of-service, all at ×3. One neglected unit, one stop, one month of damage.

How to lower it

• The pre-trip walk, every departure: lights all around, tires, brakes, mirrors, wipers, horn.
• Fix at the terminal, not at the scale — a defect costs a part at home and points on the road.
• Track repeat defects by unit; the same lamp three times is a wiring problem and a pattern reviewers notice.

The general math — time weights, the 24-month window, and the dilution effect — is in how to lower your CSA score. Violations that don't belong on your record come off through a DataQs challenge. To see your own Vehicle Maintenance standing, check your CSA score free.

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