by Ben Klayman
Nissan is expanding the number of vehicles recalled in the United States for passenger air bags that could explode with too much force and spray metal shrapnel at occupants.

by Ashley Lau and Supriya Kurane
General Motors ordered half a million replacement ignition switches almost two months before it alerted federal safety regulators of the issues that prompted a recall of millions of vehicles, the Wall Street Journal reported, citing email exchanges between the automaker and its supplier Delphi Automotive Plc .