Toyota’s been busy today. XM Satellite Radio, just announced that XM-Ready models of the 2005 Toyota Avalon, Lexus GS 300, and Lexus GS 430 are now available nationwide as a dealer-installed option.
In 2006, XM will be available as factory-installed equipment in a variety of Toyota and Lexus vehicles. Factory-installed is the way to go.

I have just purchased used 2005 Avalon and would like to transfer current XM subscription.
How can I confirm it is "satellite ready"?
Thank you