I checked this morning, rear audio works fine also. At this point, I'm not going to worry about it.
The sound quality of this kit is excellent, and even the phone calls sound clear.
Thanks for pointing that out, but I didn't get a remote for the rear audio anyway.
He meant the rear seat audio controls. If you look at your dome light, you will notice a screen on the backside of it. I didn't even realize my 4runner had it for the first few months I owned it. It requires a remote control to operate it. Not having it plugged in will not affect anything with your sound or head unit.