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A heavy key chain may deactivate the airbags in your Chevy Cobalt or Pontiac G5

GM is recalling 788,000 Cobalt and Pontiac G5 sedans for a potentially deadly problem with the ignition system. When the vehicles' keys are connected to heavy key chains (or, say, key rings laden with a dozen extra keys), a sufficiently extreme jolt or impact could shift the ignition out of the "run" position and into the "off" position. Cuts electrical power to the vehicles' systems, in turn deactivating the airbags.

“Black box” drivers hit by speeding fines from insurers

Black box insurance is nothing new. In fact, the scheme – in which a small black box is placed in your vehicle to monitor how you drive – has been around for nearly a decade. In principle, it promises lower insurance premiums.

Mazda's rotary engine stalled, not forgotten

Development of the next-generation rotary engine from Mazda Motor Corp., first unveiled three years ago, is making slow progress despite missing emissions targets. A top Mazda powertrain executive said today that the 1.6-liter rotary engine, called the 16X, is about 30 percent more fuel-efficient than the current rotary engine used in the RX-8 sporty car. In fact, the 16X so far performs slightly better than Mazda's standard two-liter gasoline engine, said Mitsuo Hitomi, general manager of the Japanese carmaker's powertrain division.