Plug and Play Aux Input

I'm looking for simple ways to add and aux input to my factory radio (A51810). Before I order anything or start taking things apart, does anyone know if this or a similar device will work?:

http://www.amazon.com/gp/product/B00883V3YI/ref=gno_cart_title_1?ie=UTF8&psc=1&smid=A1WH4GEGJCQIEN

 

Grom Audio, seems similar, a little more pricey, but the interface is great.

 

Looking a little closer, yours only allows for 3.5 mm input, the grim allows for USB input which allows you to control your files through the steering wheel or head unit controls.

Yours also mentions it must have SAT or a Multi-disc changer already, not sure if this means you just have to have the capability to do this, and/or if you already have it.

 

Last thing, on your head unit face plate right by where it says Toyota it has your model #. Your link mentions "not compatible with ___" contact the seller of three is any doubt about it.

 

Thanks, John. Grom Audio looks like a good option.