You have two options, option one, replace your existing stereo with a stereo that also has Sirius capabilities. Option Two: buy a separate Sirius radio and have installed in your car. I recommend option two because you can dock the Sirius radio in your car and when your not in the car take it out and listen to it where ever you are, home, office, etc. You can get a portable Sirius radio called the stiletto (sp?) and either use a radio transmitter (they are about $30) to transmit in your car wirelessly or get a car mount, docking station, to hard wire it to your car (more expensive but sounds better). Hope this helps. I have Sirius myself and dont even listen to regular radio anymore. Enjoy!