The Outlander Sport ES model doesn't have the option of adding heated seats. It's that something that can be DIY installed?

 

I assume that if you source heated seats out of an Outlander they should blot right in and then it's just a matter if wiring it up.

 

You can also get them added aftermarket...

I don't know if all the wiring will be the same, there's a bunch of sensors and stuff attached to the seat... I'd check all the harnesses and make sure you know how to connect the heat switches/power before you buy anything.