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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:

Toyota recalls 690,000 Tacoma trucks for rusty leaf springs, fire risk

Toyota has announced that it will be issuing a recall of 690,000 Tacoma pickups from model years 2005 through 2011. The affected vehicles include both the four-wheel-drive model and the two-wheel-drive PreRunner (but not the standard 4x2 pickups), which may have a rather serious problem with their rear suspensions.
In some cases, corrosion and stress could cause one of the three or four leaves in the rear suspension's leaf springs to fracture. While the trucks can still be driven with a broken leaf, Toyota is concerned that it could move out of position and impact other components in the rear of the truck, with a particular focus on the fuel tank. Needless to say, but a piece of metal continuously impacting anything, let alone the fuel tank, is cause for concern.
As of this writing, there have been no reports of crashes, injuries, fires or deaths due to this problem, although that won't stop Toyota from informing all affected customers of the issue. Those 690,000 owners will need to report in to dealers for inspections and, if necessary, repairs.

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We record Autoblog Podcast #317 tonight, and you can drop us your questions and comments regarding the rest of the week's news 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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