https://techcrunch.com/2021/10/04/nhtsa-rejects-petition-for-formal-investigation-into-teslas-battery-management-software/

The National Highway Traffic and Safety Administration rejected a 2019 petition requesting the agency open a formal investigation into Tesla’s battery management software over allegations that an over-the-air update was defective and caused fires in five vehicles.

The agency decided not to open a formal investigation in part because the majority of those incidents occurred outside of the United States, according to a document posted on its website. None of these were related to crashes and most were parked.