Enterprise doesnt pay for Sirius subs in their cars. I didnt know if I could transfer subs temporarily, i think you guys misunderstood my question
Do Enterprise rental cars even have Sirius radios? (I notice that they mostly deal with GM and Toyota.. These companies are partnered with XM and if they do have satellite capable radios, they will be XM radios. You can't transfer your Sirius account over to an XM radio.
Even if they have vehicles that partner with Sirius (ie Ford, Dodge), Satellite radio is an option. At the factory, they install a special receiver module behind the dash or under the seat that plugs into the car's dash mounted head unit. If the option is not ordered, the module won't be there and you won't be able to activate anything.