My 2001 Z3 has a Sony Xplode radio/CD installed. I've had the car 5 years and the radio has always worked fine. Recently there is so much static on FM stations that I can't receive any. AM works perfectly as does the CD player. I've chedked the antenna which looks fine and cleaned the screw in end. I just had all the belts replaced; would this have anything to do with FM reception in the way of frequency suppression, etc? Any audiophiles out there offer an opinion?

Thanks!