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A friend got one of these for his wife's Cherokee. Came in the mail, not registered or certified... but bulk mail. The instructions say to plug it in and give it about an hour. It doesn't say "where" to plug it in... and his wife was arguing that it should be plugged into her computer in the house and the update would be transmitted to the car. <rolling of eyes> I suggested any USB port in the driver area. We'll see.....