In a rare demand that Fiat Chrysler Automobiles buy back as many as 193,000 flawed vehicles, the top U.S. traffic safety agency signaled a tougher stance on automakers that don't identify and quickly repair defects.
The National Highway Traffic Safety Administration, criticized for its slow response to past auto problems, also wrestled admissions from Fiat Chrysler that it violated safety regulations and ordered the automaker to pay a record $105-million fine.
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