According to a recent report, the Mazda6 diesel is still a year away in the United States.

According to a recent report, the Mazda6 diesel is still a year away in the United States.

According to The Truth About Cars, the model was unable to meet U.S. diesel emissions standards so engineers were forced to modify the engine. However, when the changes were made, the output dropped significantly and was deemed too low to meet customer expectations. This reportedly resulted in a major rethinking of the diesel program and a switch to an unspecified after-treatment system to lower emissions.

As a refresher, Mazda originally intended to launch the diesel-powered model in the second half of 2013. However, the company announced the car would be delayed earlier this year. At the time, the company said the "SKYACTIV-D [engine] can meet emission regulation requirements without the use of a NOx after-treatment system" but they decided "that further development is required to deliver the right balance between fuel economy and Mazda-appropriate driving performance." Nearly two months later, Mazda North America CEO Jim O’Sullivan said the car was delayed because "We didn’t think the powertrain was ‘zoom-zoom’ enough.”

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Mazda6 diesel reportedly a year off in the United States