A Takata employee sews an airbag at Takata's current crash-testing facility in Auburn Hills, Michigan.

Japan's Takata, whose potentially defective car air bags have been linked to four deaths in the United States, is unlikely to be dumped by its automaker customers given the cost and disruption of such a move - for now.

Some business is leaking to rivals, but the industry doesn't have the spare capacity to make a significant dent in Takata's contracts. But over the coming few years, as the next new models are designed and built, loyalty to Tokyo-based