Top 10: OnStar

The turn-by-turn navigation and hands-free calling alone would make this gadget (available solely on General Motors vehicles) worth having, but it also tracks vehicle diagnostics. This lets OnStar activate automatically in the event of an accident. OnStar can also unlock your car doors remotely and guide police to your car if it's stolen.Auto Accessories at www.topgearautoparts.com/category/28/Accessories.html

 

 

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