Brake Defects Put 15% of Inspected Trucks Out of Service
CVSA inspectors placed 2,134 commercial vehicles out of service for brake violations during 2026 Brake Safety Week, with nearly half of those vehicles meeting the 20% defective-brake threshold.
More than one in seven commercial vehicles inspected in the U.S. during the Commercial Vehicle Safety Alliance's 2026 Brake Safety Week had brake problems serious enough to take them out of service. Inspectors placed 2,134 vehicles out of service for brake-related violations during the Aug. 23-29 campaign, or 15.1% of the 14,165 vehicles inspected in the U.S.
The result was little changed from 2025, when nearly 15% of inspected vehicles were placed out of service for brake violations. For fleets, that consistency is the signal: brake defects remain a routine roadside exposure, not a one-time enforcement spike.
Defective brakes drove nearly half of out-of-service findings
Across the U.S., Canada and Mexico, 1,176 vehicles placed out of service -- 49.6% of the total -- failed the 20% defective-brake criterion. A vehicle or combination reaches that threshold when 20% or more of its service brakes have an out-of-service condition.
Inspectors also recorded 600 out-of-service violations involving brake hoses or tubing, 145 for excessive air loss, and 759 other brake-related violations involving components such as air tanks, tractor-protection systems, parking brakes and low-air warning devices. A vehicle could have more than one violation.
Drums, rotors and overall performance also mattered
Brake drums and rotors received added attention during the campaign. Inspectors reported 141 drum-and-rotor violations across North America, placing 64 vehicles out of service. Rusted rotors were the most frequent finding, followed by broken drums, broken rotors and metal-to-metal contact.
In 12 U.S. jurisdictions, inspectors used performance-based brake testers on 657 vehicles. Twenty-nine vehicles failed to meet the 43.5% minimum braking-efficiency requirement and were placed out of service.
What fleet maintenance teams can do now
The inspection results support a practical maintenance focus before the next roadside stop: verify adjustment, linings and pads; check air systems, hoses and chambers; and close out low-air-warning or parking-brake defects promptly. The next Brake Safety Week is scheduled for April 18-24, 2027, but the underlying inspection points apply to every preventive-maintenance cycle.
