Comma.ai, the automotive technology startup founded in 2015 by hacker George Hotz, is now under federal scrutiny following a series of serious crashes involving its aftermarket driver assistance technology. The National Highway Traffic Safety Administration’s Office of Defects Investigation has opened an investigation into five reported crashes where Comma devices were in use, with two of these incidents proving fatal and claiming three lives in total.
The investigation centers on a critical safety concern: the devices allegedly failed to detect or respond to slow or stationary vehicles occupying the same lane of travel. Across four of the crashes, eleven people sustained injuries, with some classified as serious. The severity of these incidents has prompted federal regulators to examine whether systemic defects exist in the technology that thousands of drivers have installed in their vehicles.
Comma.ai manufactures aftermarket devices that can be retrofitted to a range of modern cars, working in conjunction with software called openpilot. This system is designed to control a vehicle’s Adaptive Cruise Control and Automated Lane Centering systems, providing functionality comparable to Tesla’s Autopilot and GM’s Super Cruise. According to the company’s own website, the technology can “steer, accelerate, and brake automatically for other vehicles within its lane,” with the stated goal to “make driving chill.” The system employs a camera-based driver-monitoring feature intended to detect distracted or drowsy drivers.
However, like other driver assistance systems, Comma.ai explicitly warns users that they must remain ready to immediately retake manual control of the vehicle by using the pedals or pressing the cancel button. Despite these warnings, the crashes under investigation suggest potential gaps in how the system performs in real-world conditions, particularly when encountering stopped or slow-moving traffic.
One of the fatal crashes occurred in February 2026 in Ascension Parish, Louisiana, on Interstate 10. A 2022 Toyota RAV4 equipped with FrogPilot, a third-party modification of the openpilot software, struck a stopped first responder vehicle. Louisiana State Police confirmed that two rear-seat passengers in the Toyota died as a result of the collision. This incident highlights an additional complication in the investigation: some of the crashes involved “forked” or modified versions of Comma.ai’s software rather than the company’s original code.
The use of these third-party modifications raises questions about liability and quality control in the open-source driver assistance ecosystem. While Comma.ai develops the core openpilot software, independent programmers can create their own versions with different features or behaviors, potentially introducing unforeseen safety risks.
George Hotz, who founded the company and became known for his hacking exploits, stepped back from Comma.ai’s day-to-day operations in November 2022. His reduced involvement came years before this investigation began, though the technology developed under his leadership now faces its most significant regulatory challenge. The investigation’s outcome could have far-reaching implications for the aftermarket driver assistance industry and the broader question of how autonomous driving features should be regulated, particularly when they can be modified by third parties after release.