Feds open investigation into recall of 1.7M Hyundais, Kias

US safety regulators have opened a formal investigation into the recall of nearly 1.7 million vehicles by Hyundai and affiliate Kia over engine defects, according to filings published Saturday. A South Korean whistleblower reported concerns last year to the National Highway Traffic Safety Administration (NHTSA), which will probe the timeliness of three recalls carried out in the United States and whether they covered enough vehicles.