After recalling 1 million vehicles worldwide in July, Toyota Motor Corp. faces the bruising prospect of more recalls in the United States.
The U.S. National Highway Traffic Safety Administration has upgraded an investigation into reports of excessive wear of a front suspension part in 2003 and 2004 Toyota Tundra pickups.
The agency said Monday that it had opened a separate probe into 2004 and 2005 Toyota Sienna minivans after receiving reports of four injuries that occurred when the liftgates shut unexpectedly.
The investigations deal a fresh blow to Toyota, which was rebuked last month by the Japanese government because of the growing number of recalls. They are up sharply in the past year and a half, threatening to undermine Toyota's reputation as the industry benchmark for quality.
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