Volkswagen's promise to deliver a fix for its rigged diesel engine "in the next few days" refers to vehicles sold in Europe and other foreign markets, not the U.S., according to a company source.
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But they said that VW also may have to modify most of the 4-cylinder diesel engines in the 482,000 cars sold in the U.S. to add a urea injection system. That is a more-advanced approach to reducing nitrogen oxides than the emissions-control system that was originally used on the vehicles, a choice driven by Volkswagen's interest in holding down costs.
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Declines in either fuel economy and performance, or both, would potentially open up the automaker to claims that it fraudulently sold the vehicles and should be responsible for refunding the entire purchase price, said another attorney suing the company.
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