Thanks a lot for reply!! I don't think my Matrix has amplifier. Though I am not absolutely sure. At least it is not behind head unit, or driver seat, or passenger seat. And I don't have moonroof/sunroof. harness, antenna adapter, install instructions and dash kit this is all I need, right? How good ...

Hello everybody. I've got 2003 Toyota Matrix with navigation unit and 6 cd changer under passenger seat. I like how the system looks like, but it is useless in the current state - I don't have navigation cd, radio doesn't work, and I have nothing on cd-s. I am looking for update to the HU or may be ...