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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:

Mazda recalls 109k Tribute models for rust issue

The Mazda Tribute is being hit with a similar recall as its platform-mate the Ford Escape underwent a few weeks ago. Mazda is recalling 109,000 Tributes from model years 2001 to 2004. On the trucks, the subframe can rust from road salt, potentially causing the lower control arm to detach. If this happens, a loss of steering control could occur.
Mazda is adding a reinforcement crossbrace for added strength on the affected models. The recall covers Tributes currently registered in or originally sold in 20 northern states and Washington, DC, where road salt is used.
The reinforcement braces aren't available yet to do the repair. Mazda will send a letter in May to owners of affected vehicles that will inform them of the problem, and a second letter telling them when the parts will be ready. Scroll down to read the full recall press release.

Mazda hits Vegas with a pair of Sixes

Despite the fact that the annual SEMA show is more of an exercise in what "could be" than what "will be," it gives automakers the chance to stretch the legs of some of its most important models. Take the 2014 Mazda6, for example - it's hardly new, having gone on sale early this year - but this year's SEMA expo marks the first time Mazda has been able to show off the customization possibilities for its sleek midsize sedan. To that end, the Japanese automaker has arrived in Las Vegas with two very different takes on its sexy Six.
First up is the Mazda6 Club Sport you see above, wearing a "motorsports-inspired" gray, black and red accent-color scheme that, as Mazda says, is "represented in not-so-subtle angular lines reminiscent of a car speeding past your line of sight." The whole car is done up in a base color of Composite Grey, and uses a Brilliant Black roof to match the similarly colored front, side and rear diffusers, as well as the rear spoiler. Mazda has fitted the Club Sport with Rays 57 Motorsport G07FXX 20-inch wheels, wrapped in Yokohama 245/35R20 tires. Powering the CS is Mazda's 2.2-liter Skyactiv-D diesel four-cylinder engine (that we'll get in the standard Six early next year), and other changes include an H&R spring kit, larger Brembo brakes and a Racing Beat exhaust.
And then there's the Ceramic 6 Concept, pictured right. The name comes from the car's Ceramic White paint, though we don't really get the Taupe Silver accent stripes. Mazda says they're meant to mimic "the linear frequency patterns found on the likes of couture dresses and flowing fabrics," but it just looks a bit overwrought to us. The Mazda6 already has so many clean lines, why add more?