Takata did not disclose how much it expected Wednesday's Toyota recall would cost, but last year's recall cost the Tokyo-based auto supplier $300 million. The company's shares were down more than 4 percent when the Tokyo market closed.
Previously, Takata told U.S. safety regulators it improperly stored chemicals and botched the manufacture of the explosive propellants used to inflate air bags. It also kept inadequate quality-control records, making it impossible to identify vehicles with potentially defective inflators.
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The Takata-related recall in 2013 was the largest air bag-related recall in history and came after a series of recalls, accidents and at least two deaths alleged to have been caused by faulty air bags.
Toyota said on Wednesday it was expanding its April 2013 recall involving 2.14 million vehicles manufactured between 2000 and 2004. The serial numbers Takata provided for potentially flawed inflators had been incomplete, Toyota said.
In an unusual step, Toyota said it would also instruct dealers in the United States and other overseas markets to begin replacing suspect Takata inflators in all vehicles covered in a recall announced last year. Previously, the automaker had asked dealers only to replace inflators that were defective.
``We have judged that it is more certain to replace everything,'' Toyota spokesman Naoki Sumino said.
More than 766,000 Toyota vehicles were affected in last year's recall in the United States.
NHTSA said it has opened a probe into an estimated 1,092,000 vehicles made by not only Toyota, but also Honda, Nissan, Mazda and Fiat's Chrysler Group after receiving six reports of air bags not deploying properly in the humid climates of Florida and Puerto Rico.