Not to dis you but I have a 08 and the terk and it works. Sorry yours didn't.If it's an 08' the terk won't work, you HAVE to use the toyota. I went through all this and even had to call terk directly. The toyota parts run about $290 if I remember correctly, and it took me about 15 minutes to install. Look up radio removal on the forum. I put the reciever box thing in the cavity next to the glove box (remove glove box and look at the empty space to the right) instead of under the seat like the dealer does. I have kids and anything under the seat would get messed with.
If you check the quote closely, most of it is the dealer labor cost.Anyone try to get XM sat installed. Dealer quotes me $750.00 installed with all wires hidden. Seems high to me.