From the article: The National Highway Traffic Safety Administration (NHTSA) has asked Tesla to explain why it rolled out a safety enhancement for its Autopilot driver-assist system without issuing a safety-related recall. The Autopilot improvement was rolled out to Tesla’s fleet of vehicles through a free over-the-air update.

The NHTSA is currently probing Tesla’s Autopilot, as well as comparable driver-assist systems from other automakers such as BMW, Honda, Hyundai, Toyota, Ford, Nissan, Setllantis, Kia, Volkswagen, General Motors, Mercedes-Benz, and Subaru. The probe was initiated partly due to several incidents of Teslas on Autopilot crashing into an emergency vehicle parked on the side of the road.