Does anyone know if I can put XM radio in my CX-9? The factory radio is SAT ready and has a SAT button. I know that TERK makes an XM direct tuner but you need a "smart adaptor" that is specific to your radio brand. I haven't found anything yet and my local stero shop isn't aware of anything either. Any help?

Currently Mazda uses Sirius... I dont "think" you can use xm with the "sat" system that's built into the car.

Thanks. I am trying to stay away form Sirius d/t having XM in my other car. Cheaper to have 2 subs to same service than 1 of each.

It's very possible that one will soon be the other anyways... they're in the process of trying to merge....

Nothing for the CX-9 yet, but PIE Electronics makes kits for XM to work directly with factory radio.
http://www.pie.net/

Yes there is a unit, per say, that will hook into your existing factory installed radio. It will work with your NAV unit display too.

http://www.crutchfield.com/S-pm0UA314e9z/App/Product/Item/Main.aspx?g=247350&i=220CNP20UC&tp=87

The model is Audiovox CNP2000UC if the link does not work.