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2013 Dinan S3 BMW 550i

Steve Dinan has been enhancing BMW models since 1979. But don't throw his company into the ring with the dozen or so other tuners who tweak, tinker and piggyback upgrades on the famed German marque. Dinan is a tuner, but it's also an engineering firm that writes its own software, builds its own parts and then backs everything it does with a factory-grade warranty. That sort of fastidiousness comes at a price, but most of its customers - including the powerhouse of BMW Motorsport - rely on Dinan to help them come out on top.
In stock form, BMW's 550i is a formidable four-door with a twin-turbocharged 4.4-liter V8 rated at 400 horsepower and 450 pound-feet of torque. While those figures allow it to run with quick company (0-60 in 5.0 seconds, according to the automaker), Dinan puts the sedan's kettle on full boil with its S3 package. Starting with the engine, the performance engineering firm bolts on larger turbochargers, air-to-water intercoolers, a trick strut tower brace cold air intake, a quad-pipe free flow exhaust and its own engine management software. Pump in some premium fuel, and the result is 542 horsepower and 587 pound-feet of torque. Power is sent through the stock eight-speed automatic to a limited slip rear differential (Dinan will upgrade xDrive all-wheel drive models, too).
The Dinan S3 also features and extensive suspension upgrade that includes new front camber arms and low compliance rear control arms (engineered to reduce understeer and improve turn-in). The stock dampers are retained, but new bump stops are installed along with new springs. Overall, the car rides about a half-inch lower than stock to improve roll rate. To reduce unsprung weight, forged 20-inch HRE Performance wheels are fitted at all four corners (wearing Michelin Pilot Super Sport tires - 275/35ZR20 up front and 295/35ZR20 in the rear). Lastly, the company remaps the factory Electronic Damper Control (EDC) software with its own Dinan Shockware to work in conjunction with the new enhancements.

X4 launch to spearhead BMW crossover onslaught at NY Auto Show

It's no secret that crossovers are one of the key vehicle types driving today's auto industry profits, and nowhere is that more true than among the world's luxury brands. BMW became one of the first players in the luxury CUV segment when it launched its original X5 in 1999, and buoyed by that model's runaway success, it followed up with the X3 in 2003, the X6 in 2008 and the X1 in 2009 (though the latter didn't make it to the US until late 2012). It's replaced the X5 twice since then and the X3 once, but the Bavarian automaker isn't about to let matters rest there.
First off, a production version of a new X4 model is expected at the New York Auto Show in April. The model was previously rumored to be earmarked for reveal a month earlier, but a new report from Autocar suggests that the previously mooted reveal date and location were inaccurate. The X4 is expected to apply the same controversial slant-back formula to the X3 that transformed the X5 into the X6, which will in turn lead to an update for the X3 as well.
But that's not all. Autocar also reports that before 2014 is out, BMW will unveil a revised X6 at the Moscow Motor Show in August, which will in turn be followed by upgraded versions of both the X6 M and X5 M. These high-performance crossovers are tipped to pack the same 4.4-liter twin-turbo V8 as the outgoing versions, albeit with higher outputs than the current models' 555 horsepower and 500 pound-feet of torque. All this, and they're still expected to simultaneously improve fuel consumption and emissions figures.

NHTSA gives okay for three automakers to skirt tire-related recalls

BMW, Honda, and Mercedes-Benz are all going to avoid small recalls, after the National Highway Traffic Safety Administration issued petitions for "findings of inconsequential noncompliance" to the three manufacturers, according to Tire Business. Basically, the petitions allow the brands to avoid recalls for some very, very minor issues.
BMW had tire placards on 364 X6 M CUVs that stated the car could only handle four passengers, when in reality it had room for three in the back. Actual plausibility of fitting three real humans in the slope-roofed Bimmer aside, the Munich-based manufacturer argued it was inconsequential, as the placards were correct regardless of the number of passengers.
Honda's case focused on 212 2011 and 2012 Acura TSX sedans equipped with 18-inch wheels. The TPMS systems on these cars were set for 17-inch wheels, rather than the larger hoops, but even with the lower settings, the tires maintain adequate load capacity.