The original tuner isn't in the car. I had to buy one from a crashed Audi and got the device installed a couple weeks ago. It has been working fine and then all of a sudden it just stopped working yesterday. I checked the tuner box in the trunk and the connections are fine. Antenna seems fine as well. The channels still appear when I hit "SAT" button on the radio. Do I need to call Sirius and see if there is a reset or something?