The U.S. National Highway Traffic Safety Administration (NHTSA) is investigating Comma’s aftermarket self-driving technology after reported crashes that include fatalities. Carscoops reports that the probe follows three deaths, while TechRadar says the investigation concerns additional crash incidents involving the kit.

Comma’s system is designed to add driver-assistance and self-driving features to older vehicles. According to Carscoops, the technology is used by more than 30,000 drivers, indicating a sizable installed base. TechRadar characterizes the kit as marketed for use in older cars and notes that NHTSA is looking into the circumstances around several crashes linked to the device.

The outlets differ mainly in emphasis and incident counts, with Carscoops focusing on three deaths and TechRadar on five crashes. Both describe the investigation as federal scrutiny of the aftermarket system’s performance and safety outcomes. The NHTSA probe is ongoing, and the full findings have not been reported in the provided sources.