the XMSCION03 code DID work, and I even got them to put on 3 months of NAVtraffic for free for me to try just be asking.. which I thought was amazing. but then they called me a few days later and said my unit was aftermarket and the code doesn't apply. my NAVtraffic was cancelled, and they needed me to be put on a plan. how can they know that? hm.. suspicious.
the code ZWINBACK for $77/year still works. just call CSR and ask for 77$ plan and when they ask for the code, give them that. well, it works so far.. they better not call back.
the rep told me that the $77 is only for a one year