We are vigilant and we continue to look for potential causes, ” Toyota's James Lentz told a congressional panel.

丰田的詹姆斯伦茨对国会小组称，“这次事件为我们敲响了警钟，我们会继续排查潜在的原因。”

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As part of Wednesday's changes, Toyota named James Lentz to lead its efforts in North America.

WSJ: Toyota Overhauls Management

The world's biggest automaker also promoted four non-Japanese managers to oversee regional businesses, including James Lentz, an American who already leads Toyota Motor Sales in the U.S. He will head the North American region.

NPR: Former GM Executive Tapped For Toyota Board

Toyota also promoted four non-Japanese managers to oversee regional divisions, which will become more autonomous, including James Lentz, an American who already leads Toyota Motor Sales in the U.S., to head the North American region.

NPR: AP Interview: Toyota Chief Stresses Safe Growth