The U.S. National Highway Traffic Safety Administration opened a preliminary investigation on September 21, 2026 into an aftermarket driver-assist system, covering an estimated 30,000 devices, after the technology failed to detect or respond to slow-moving or stopped vehicles ahead. Regulators identified five crashes tied to the system, including two fatal collisions that killed three people, plus additional crashes that injured up to eleven others. One fatal crash involved a modified, third-party version of the underlying driving software.