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Japan plans real-world diesel emissions test after companies fail

Japan's transport ministry plans to start real-world diesel emissions tests after an experiment found four models from Toyota, Nissan, and Mitsubishi that produced more nitrogen oxide (NOx) emissions than the nation's rules allow, according to The Japan Times. Regulators there usually only perform emissions checks in the lab. The VW diesel scandal has everyone double-checking their figures. Diesel versions of the Toyota Hiace van, Land Cruiser Prado, and Nissan X-Trail produced up to 10 times more NOx than allowed. The Mitsubishi Delica D:5 was up to five times over the limit, The Wall Street Journal reports. There was no evidence of defeat devices in the vehicles. Mazda performed well in the experiment, though. The CX-5 passed with nearly the same results on the road and in the lab. The Demio, better known as the Mazda2, did nearly as well with only slighter higher figures in the real world than in the controlled setting. The experimenters theorized the reason for the excessive emissions was that cold weather caused the engines' software to shut off the exhaust gas recirculation to prevent damage, according to the WSJ. However, this behavior also increased NOx production. Toyota, Nissan, and Mitsubishi don't have to worry about punishment from the transport ministry because this check was just an experiment. Their models already passed the mandated lab tests, which was the only requirement, according to The Japan Times. As governments begin greater real-world emissions tests, the results suggests diesels aren't very clean. A recent check in France found models from Ford, Renault, and Mercedes-Benz that didn't perform up to the standards. Regulators in India conducted similar evaluations and ordered VW to recall over 300,000 vehicles. Related Video:

Submit your questions for Autoblog Podcast #336 LIVE!

We're set to record Autoblog Podcast #336 tonight, and you can drop us your questions and comments via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
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Toyota plotting WRC-inspired Yaris hot hatch

The emergence of the new Honda Civic Type R goes to show that the Japanese can make hot hatches every bit as good as the Europeans. But though it's been a while since Toyota had a serious contender in the game, word has it that it's about to jump back in. The impetus for Toyota's (re-)entry into the hot hatch segment is its impending return to the World Rally Championship. The company announced just a couple of months ago its intention to run a Yaris-based (or at least -styled) rally machine in the WRC by 2017, and now the latest reports indicate a road-going version won't be too far behind. Though the competition-spec model is expected to pack a 1.6-liter turbo four built by Toyota Motorsport GmbH specifically to comply with FIA regulations, the street-legal Yaris hot hatch is tipped to carry the 2.0-liter turbo four from the Lexus NX 200t. Though the jury's still out, it'd likely stick with front-drive instead of a more complex all-wheel drive system, but with a six-speed manual and a limited slip differential, it has all the potential to be a real firecracker. Only a limited number will likely be offered, ostensibly to meet FIA homologation requirement – in the same vein as the Citroen DS3 Racing or the Volkswagen Polo WRC Street – and likely to carry a similarly premium price tag in the neighborhood of 34,000 euros. We'd be pleasantly surprised if any of them were to make it to North American showrooms, though.