rronline.com says:

Infiniti Expands Availability Of Sirius, XM

The automaker is offering both satellite radio services as a factory-installed option in all of its models starting this month. Previously, both services were available as a factory- or dealer-installed option in the FX45 crossover vehicle, but availability now expands to the Infiniti Q45, M45 and I35 sedans and G35 coupe and sedan models. All Infiniti vehicles will now come from the factory with pre-wiring for either service. As an incentive, Infiniti is offering a Sirius system and two months free service with no activation fee for $400