Is the BM53 the radio module I'd need to add factory Sirius? I have an early 2003, but had serious problems with the radio and during the troubleshooting and problem resolution, the radio module was replaced. Is there hope that they replaced with the more recent generation radio module?

If I happen to have the pre 10/2003 radio module, can I easily just buy the 10/2003+ module and plug and play it with my current system (with nav/non dsp)?