A cyberattack on Intoxalock has left thousands of drivers across the United States unable to start their vehicles. The company, which provides breathalyzer ignition interlock devices, confirmed it took systems offline after the March 14 attack. These devices require regular calibration, and the outage has prevented Intoxalock from performing necessary maintenance.

Drivers in states from Maine to Minnesota report being locked out of their cars. Local auto shops report vehicles parked for days because owners cannot start them. One Massachusetts shop told WCVB 5 that cars have been stranded in its lot all week. Reddit users confirm that missed calibrations trigger lockout mechanisms, effectively preventing vehicle operation.

Intoxalock serves 150,000 drivers annually across 46 states, according to its website. The company would not disclose whether this involved ransomware, data theft, or ransom demands. Without an estimated recovery timeline, affected drivers remain uncertain about when they can regain vehicle access. This incident highlights the vulnerability of safety-critical IoT devices when manufacturers become cyberattack targets.