NHTSA closes four-year probe of Ion steering issues after GM recall
April 21, 2014 at 09:12 AM EDT
DETROIT (Reuters) - U.S. safety regulators closed a four-year probe into power steering problems in almost 335,000 older Saturn Ions after General Motors Co recalled the cars, which are also part of an unrelated recall of defective ignition switches linked to at least 13 deaths.