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2014 BMW 4 Series drops its top, priced from $48,750*

BMW will debut its new 2014 4 Series Convertible at the Los Angeles Auto Show in November, and after seeing plenty of spy shots and, most recently, some leaked images, we now have all the official details. To no one's surprise, the 4 Series convertible is, essentially, a topless version of BMW's new-for-2014 4 Series coupe, and will be offered in the United States in the same 428i and 435i guises.
On the base end, that means the 428i Convertible arrives with the company's 2.0-liter turbocharged inline four-cylinder engine, good for 240 horsepower and 255 pound-feet of torque, and available with either rear- or all-wheel drive. BMW says the 428i will sprint to 60 miles per hour in a respectable 6.2 seconds. For folks in need of more thrust, BMW will happily sell you a 435i Convertible, available only with rear-wheel drive, powered by a 3.0-liter, twin-turbocharged inline-six that produces 300 hp and 300 lb-ft of twist. Hitting 60 mph in the 435i will take roughly five and a half seconds with the standard eight-speed auto. Curiously, BMW did not mention anything about a six-speed manual transmission for either model, so looks like this droptop might be an auto-only affair. We've contacted BMW for confirmation, so we'll keep you posted.
Like the 3 Series Convertible it replaces, the 4 Series uses a three-piece folding hardtop configuration, and BMW says that added sound deadening reduces audible wind noise by about two decibels. Folding the automatic roof takes just 20 seconds, and can be done at speeds up to roughly 11 mph. For chilly, top-down driving (something we're big fans of), there are now three-temperature neck warmers for the front seats - just like what Mercedes-Benz offers with its AirScarf system.

BMW confirms limited i3 Electronaut Edition, says i5* is in development [UPDATE]

Jacob Harb, head of electric vehicle operations and strategy for BMW, is excited these days. He's got a lot to sort out as the company's first large-scale production electric vehicle, the i3. Extending Electronaut leases, arranging tens of thousands of EV test drives and making sure there will be enough of the little city cars in the US when customer deliveries will start in May. Oh, and he's already working on the next BMW EV, which we think is likely to be the i5. During the Detroit Auto Show this week, Harb declined to name the model (surprise) but he did tell AutoblogGreen, "You can probably take an educated guess at the next thought process, something a little bigger, maybe a little more range, relative to the i3. We've got everything trademarked and we're exploring the best, next iteration. It is coming. It's in development now." [See update below.] An i5 has been rumored for years, but Harb said he's flying to Munich next week to "start the discussions further" on BMW's next-gen EVs. The Electronaut Edition i3 is "a thank you to them for being part of this broad journey with us" - BMW's Jacob Harb But there's much more to do, given the upcoming i3 launch. For one thing, leases for the first participants in BMW's Active E electronaut program - which started in January 20121 - will end in the next week or so, and those who want to get an i3 – and an "overwhelming majority" have said they are interested - may get their leases extended so they don't have to revert back to a gas car in the meantime. BMW dealers will be able to start ordering the i3 in "the next few days" and the Active E Electronauts will get the first of those cars off the production line, "as a thank you to them for being part of this broad journey with us," Harb said. There will also be a special Electronaut Edition of the i3, that will be upgraded from the standard i3 at not cost. Harb wouldn't say what's different, just that the "options and features" will serve to identify the car from the outside. It will be "as unique and compelling as possible," he said, with details coming in the next few weeks. The i3 is already on sale in Europe, the company won't start making US-bound vehicles until March. Since there are no official i3 orders in the system yet, Harb didn't know exactly what the split will be between pure EV and the range extender version, but that his estimate is 50/50. He also wouldn't talk about production numbers, but did say that.

BMW to offer carbon fiber wheels in a year or two

The Citroën SM sat on the first set of production glass fiber and resin wheels in 1972 when parent company Michelin developed the exotic hoops in order to take the SM rallying. It wasn't until 2008 that we got the first all-carbon-fiber wheel for passenger cars in the form of a prototype model from Weds Sports in Japan that remained a prototype. Australian company Carbon Revolution followed that a year later with its CR-9 all-CF wheel, first introduced on the Shelby Ultimate Aero and now available for independent purchase for about $15,000 per set. BMW could be the first OEM to offer entire wheels in carbon fiber reinforced plastic in two years.
The wheels - either all-CFRP or using a CFRP rim and alloy spokes - were shown off during BMW's Innovation Days in Munich and are products of the development work done on its i-branded cars. The full-CFRP wheel is 35-percent lighter than a forged alloy wheel, the hybrid alloy and CFRP wheel is 25-percent lighter, making for a decent drop in unsprung rotating weight. As demonstrators during a tech day the wheels aren't yet in the pipeline for production and EU approval, but an article in Auto Express claims that they could be on the market as soon as two years from now.
Other possible parts include a full carbon fiber steering wheel and propeller shaft, the latter of which is coming as a single-piece component on the new M3 and M4. BMW is also talking up its use of secondary carbon fiber - waste material from i3 and i8 production - that can be used for items like IP support structures, seat frames and spare wheels in place of traditional metals like aluminum and magnesium. There's an excerpt of the Innovation Day press release below with more details.