KENWORTH W9 Series
PowerObserved trucks and fleets, single-power-unit inspection outcomes, and failure groups grounded in the federal CFR section and BASIC reference.
Interpretation guardrail
These roadside results reflect operators' maintenance and duty cycle as much as the vehicle. They are not evidence of a manufacturer defect. OOS rates and failure frequencies are normalized per inspection, never presented as a raw count pretending to be a rate.
Violation detail is as of Nov 7, 2026; it is not current. Platform and cab labels appear only where external evidence established them. A missing label means “not established,” never “no.”
Observed model footprint
Attributed inspection span: Jun 12, 2023 – Nov 5, 2026.
Reported trucks sum FMCSA truck_units across distinct observed fleets after the existing plausibility clamp. It is operator context, not this model's production count, and never uses power_units or MCS-150 mileage.
Level-scoped OOS outcomes
Rates count OOS inspections only inside the same inspection-level population used by their denominator.
Top violation groups
Attributable vehicle violations grouped only by CFR section and BASIC category as of Nov 7, 2026. Frequencies are per 100 attributed inspections.
CFR 392.2 · Unsafe Driving: 10,975 violations; 62 marked OOS.
CFR 393.9 · Vehicle Maintenance: 9,959 violations; 1,543 marked OOS.
CFR 393.75 · Vehicle Maintenance: 5,728 violations; 3,817 marked OOS.
CFR 393.45 · Vehicle Maintenance: 5,518 violations; 1,402 marked OOS.
CFR 396.17 · Vehicle Maintenance: 4,961 violations; 0 marked OOS.
CFR 393 · Vehicle Maintenance: 3,802 violations; 1,967 marked OOS.
CFR 393.11 · Vehicle Maintenance: 3,785 violations; 84 marked OOS.
CFR 393.55 · Vehicle Maintenance: 3,521 violations; 0 marked OOS.
CFR 396.3 · Vehicle Maintenance: 3,308 violations; 1,875 marked OOS.
CFR 393.47 · Vehicle Maintenance: 3,143 violations; 169 marked OOS.
Established platform and cab splits
Only externally sourced labels are listed; the model rollup above still includes VINs whose labels are not established.