Some Japanese Diesel Cars’ On-Road Emissions Higher Than in Lab Tests – Wall Street Journal

Posted: Friday, March 04, 2016

TOKYO—Japanese authorities said they found on-road emissions were much higher than in laboratory tests of certain diesel-powered vehicles made by Toyota Motor Corp., Nissan Motor Co. and Mitsubishi Motors Corp. sold in Japan.

Two Toyota vehicles and a Nissan vehicle tested on roads emitted up to 10 times the amount of nitrogen oxides, or NOx, than the standard they needed to meet in laboratory tests, while a Mitsubishi vehicle…

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