Get ready to tech up your driving experience, as Garmin has unveiled a new accessory for its nuvi line of GPS devices that lets you add a number of customizable gauges and monitoring utilities. The new ESP module tucks into the OBD-II diagnostics port on your car and communicates (via Bluetooth) all-important data like intake air temperatures and the fuel efficiency of your driving to the nuvi up top. Yea, it's been done before, but Garmin is (for the time being) a major force in navigation devices and could truly popularize
