Yes, the Onyx Plus should work great in your vehicle.

he factory Mazda radio is not directly compatible with the SXV300 tuner. you would need to change the radio out to a SiriusXM aftermarket model or you can try adding a Dock and Play model like the Onyx EZR or Onyx Plus

No special steps to hook up as long as you have a southern facing window with an unobstructed view of the southern horizon. The kit comes with everything you need. Optional 50ft extension cables can be purchased if you the radio needs to be more than 20 feet from the southern facing window. Or if your window has metal screens or metalized coatings for energy efficiency which can block our satellite signal and require that the included weather proof indoor/outdoor antenna be placed outside the window.

The Tour's 360L streaming features will require an internet connection over Wi-Fi. You can use your smartphone as a hotspot or if your vehicle has a built-in hotspot you can use that as well (Will consume data so check with your carrier on rates). The Voice function also requires the internet connection to perform its search. The Tour is compatible with an optional remote control that has a voice button on it - Model SXWBR1-D which can be purchased separately - (https://shop.siriusxm.com/Remote-Control-for-SiriusXM-Tour-Radio) or it comes included with the SiriusXM Home Kit model SXHD4 so you can use the Tour in your home or office as well.