I've had Sirius for one year. I purchased my radio through Sirius and this antenna came with it. I then ordered another car kit for my other car which came with this antenna as well. After 6 months one stopped functioning and I was stuck "aquiring signal" so I tried the one from my other car and it worked. I ordered another one of these to replace the broken one and within a week my 2nd one stopped working. I connected the third one and after 2 months I'm getting a "cannot locate antenna" error. I'm now searching for an alternative as not to waste any more money on this product that just doesn't last.