my sirius radio does the same thing. in the car i had before i installed an aftermarket cd/sirius radio in it and it was great. now i have the plug and play and i pick up static when i travel out of the radio stations range the FM transmitter is using. my dad bought this thing that hooks into the antena in the back on the stock radio and so it gets ride of the transmitter but still runs throught the FM station it is supposed to eliminate the static. i could but the aftermarket cd player in this car but i dont want to get ride of my 6 cd player lol. as soon as it gets warmer my dad is gonna put that in my car and also the amp and sub i had in the other car. so if anyone else has this devide tell us how it does.