The Transportation Department said it had reviewed more than 400,000 pages of Toyota documents to determine whether the scope of the company's recalls for pedal entrapment was sufficient.
"As a result of the agency's review, (the National Highway Traffic Safety Administration) asked Toyota to recall these additional vehicles, and now that the company has done so, our investigation is closed," said NHTSA administrator David Strickland.
Toyota has now recalled more than 14 million vehicles globally to fix gas pedals and other safety problems since 2009. The company has received intense scrutiny from the government since August 2009, when four people were killed in a high-speed crash involving a Lexus near San Diego.
U.S. regulators largely cleared the company earlier this month, saying that electronic flaws were not to blame for reports of sudden, unintended acceleration that led to hundreds of complaints. Transportation officials tied the problems to mechanical defects dealt with in recalls and "pedal misapplication," in which the driver stepped on the accelerator instead of the brakes. The company has, however, paid the U.S. government a record $48.8 million in fines for its handling of three recalls.