I have had a SIR-PNR1 for about 5 years. It has been working great. Now I get "aquiring signal" and for a brief minute it says Sirius but goes away. While it first start the channel is 000 then after the brief reception it changes to 124(my usual channel). I replaced the antenna and get same symptoms. I get an antenna error while it is disconnected. Can you still buy the SIR-PNR1 or do you need to change to SIR-PNR2.

SOURCE: Sirius sir-pnr1

I'm having the same problem and all they reccommend is unplug the unit from the back for ~2 minutes and then plug it back in and power up.

SOURCE: sirus radio

I had the same problem and I replaced my car antenna. That resulted in immediate signal improvement. But three months later, the same thing. So, another dot micro car antenna. Three months later, the signal went out again. The home kit worked perfectly. In my case, I bought a Sirius outdoor home antenna and replaced the standard indoor/outdoor antenna that came with the home kit. I took the home kit antenna and connected it to my S50 car kit and positioned the antenna on the front of the dash. No problems since then. Not one. Those dot antennas are horrible. I'd check that before getting a new radio.

SOURCE: Sirius radio with xm antenna

Not advised. They have different resistance and are set up for different Sat signals. Chances are you will decrease the life of your radio if you get a signal at all.

SOURCE: Clarion & Sirius Radio reception

Did You pay Sirius for their service?

SOURCE: SIRIUS Sportster "Acquiring Signal"

Let me save you $30.00. A new antenna will not help, nor will cleaning the contacts. I just did both of those and it did not help. I have mine in the freezer right now cooling it down. Sirius told me that I should not leave it in the car because it gets to hot. They told me to buy another unit....