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BMW i8's three-cylinder sounds like it's shaping up quite nicely

We've run across some rather interesting news... or perhaps we should say interesting sounds. The folks from Bimmerpost have scrounged up a short video showing a preproduction BMW i8 running through a few gears in Sport mode at a quick pace, and if you were concerned that the somewhat eco-friendly nature of the upcoming German sports car would neuter its ability to stir the aural senses, fret not.
Judging by the lovely noise coming from the engine compartment of the i8 in the video, BMW's expertise in tuning high-strung, small-bore engines - remember, BMW Motorrad has quite the penchant for well-conceived motorcycle engines - has come through loud and clear. Now, it's worth mentioning that BMW's controversial Active Sound technology will be included with the i8, so the production car may not sound exactly like this version, which is running with the tech disabled. Owners won't have the ability to disable Active Sound on production i8s.
In related news, Bimmerpost reports that BMW will equip the i8 with an external Active Sound Design system to go along with its Pedestrian Protection System. That means those on the outside will likely hear piped engine recordings from the rear and a sort of "howl" from the front in order to warn pedestrians that the otherwise quiet (when running on electricity, that is) car is approaching. It will also feature technology that can stop the car before contacting a pedestrian.

BMW broadens engine bolt recall to nearly half-million cars worldwide

Almost one month ago, we reported on a BMW investigation into a potentially defective bolt that lived in the company's VANOS variable valve timing system. At that point, the potential recall was seemingly limited to Chinese-market cars; the company was filing a recall application with Chinese officials.
Today, Bloomberg is reporting that the engine bolt issue has expanded into a recall for several world markets, involving some 489,000 vehicles. BMW was able to verify that report to Autoblog, while also providing a great deal more detail about the issue and vehicles affected.
The recall affects vehicles powered by N55 inline six-cylinder gasoline engines equipped with VANOS and Valvetronic technologies. 1 Series, 3 Series, 5 Series and 5 Series Gran Turismo, X3, X5, X6 and Z4 models from the 2010 to 2012 model years are included, as is the 2012 6 Series.

Alpina D3 may be coming to Frankfurt with 350 hp, AWD

Rumors are swirling that Alpina, the tuning house that specializes in all things BMW, will followup its Geneva debut of the B3 Bi-Turbo with an oil-burning variant slated for debut at September's Frankfurt Motor Show. The news comes from Auto Zeitung, which reports that the second-generation D3 will be based off the Europe-only 335d.
This is a departure from the last D3, which had the four-cylinder turbo-diesel from the BMW 123d in a 3 Series body. The new model is expected to use a 3.0-liter, twin-turbocharged inline-six, which will generate 350 horsepower and 516 pound-feet of torque. That should scoot it to 62 miles per hour in under five seconds (likely while towing a tree stump). Both rear- and all-wheel drive should be available on the D3, and we imagine the thrill of this much power channeled through just the two rear wheels to be akin to skydiving sans parachute.
For our European friends that want an Alpina D3, but don't need more torque than any American full-size pickup, there may be plans to offer a four-cylinder variant that still delivers Alpina performance without a compromise in economy. We'll have more on the Alpina D3 when it debuts at the 2013 Frankfurt Motor Show.