The National Highway Traffic Safety Administration (NHTSA) is investigating Tesla's Full Self-Driving (FSD) feature in relation to four crashes. The collisions took place in reduced-visibility conditions with either the beta or supervised versions of FSD enabled. In a November 2023 incident in Arizona, a Model Y fatally hit a pedestrian, as TechCrunch notes. An injury was sustained in one of the other three collisions, which occurred between March and May this year and all involved Model 3 EVs. The NHTSA says conditions such as sun glare, fog and airborne dust lowered visibility in these incidents. The agency's Office of Defects Investigation (ODI) is looking into FSD's ability to "detect and respond appropriately to reduced roadway visibility conditions."

The US government's road safety agency has opened an investigation into 2.4m Tesla vehicles with the automaker's Full Self-Driving software after four reported collisions, including a fatal crash. The National Highway Traffic Safety Administration (NHTSA) on Friday said it was opening the preliminary evaluation after four reports of crashes where Full Self-Driving was engaged during reduced roadway visibility like sun glare, fog or airborne dust. In one crash "the Tesla vehicle fatally struck a pedestrian. One additional crash in these conditions involved a reported injury," NHTSA said. The investigation covers 2016-2024 Model S and X vehicles with the optional system as well as 2017-2024 Model 3, 2020-2024 Model Y, and 2023-2024 Cybertruck vehicles.