The National Highway Traffic Safety Administration (NHTSA) told Reuters it was urging potential informants to call its hotline at 1-888-327-4236, promising legal protection. “We encourage all individuals with information about the manufacture or testing of Takata air bag inflators, or who have knowledge of possible defects or any wrongdoing by the company, to make this information available to NHTSA,” agency spokesman Gordon Trowbridge said.