GM may recall 4.3mln vehicles

WASHINGTON: General Motors Co said on Thursday it may be forced by U.S. regulators to recall another 4.3 million vehicles for potentially defective Takata air bag inflators, a call-back that would cost the U.S. automaker $550 million.  GM said in May it would recall 1.9 million vehicles for Takata Corp air bag inflators that may not work properly.