A U.S. judge has rejected a bid by air bag manufacturer Takata Corp and automaker Honda Motor Co to toss out a class-action lawsuit on behalf of millions of owners with potentially faulty airbag inflators, even as the firms are moving to quickly settle death claims. The Japanese companies have agreed to undisclosed settlements for six of eight deaths linked to ruptured inflators as U.S. prosecutors ramp up a probe of the ruptures and whether regulators were misled.