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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.

Crafting the Ferrari LaFerrari

Ferrari's limited-edition supercars are special. They appear about once a decade, cost a small fortune -- which has never hurt sales -- and often become the benchmark for next-generation supercars at Ferrari and in the industry. Ferrari Chairman Luca Cordero di Montezemolo says the new LaFerrari is no exception because of features such as the supercar's gasoline-electric hybrid powertrain, its Formula One-inspired carbon fiber cockpit and its state-of-the-art active aerodynamics.

Nissan upgrades the Versa engine to add mpg

The redesigned Versa sedan that reaches Nissan showrooms later this summer will post a 30 city/38 highway mpg rating, up from the current model's 28/34 rating. The Versa still has a 1.6-liter four-cylinder engine, but the 2012 model gets a dual-fuel injector system, the first U.S. application of the Nissan technology.