Doing the same digging! I ended up with a similar Android HU as the OP, but fully integrated into an included trim piece: https://ae01.alicdn.com/kf/S8424811bfe9b4e3bb8aa2264d7b4532dH/EKIY-T8-For-Toyota-Matrix-2-E140-2009-2010-2014-Car-Radio-Multimedia-Player-Touch-Screen.jpg_.webp The harness that ...

Oh wow. That's probably a fun project, but a bit out of my comfort zone. The unit in my car is quite different as well.

I'd just wire in a new aux port to the cd player input into the main amp. I plan to do that to my factory radio once the parts arrive. There's a dedicated CD player input in the amp? The one under the passenger seat? Or do you mean splicing into the wire harness behind the radio? What parts are you...

I just bought a 'Car Audio Interface' kit on eBay in hopes of adding some functionality to the stock radio whose AUX port has been broken for years. The kit is apparently compatible with the Matrix flavor of this radio, but it uses the CD changer port that is absent from the Vibe version. Guess I sh...