Reddit mentions of Factory Radio Stereo Auxiliary Aux 3.5mm MP3 Audio Input Adapter Cable Fits Mitsubishi 2003-2012 (Lancer, Eclipse, Galant, Endeavor, Outlander, Grandis, Lancer Evolution, Triton, Spyder)

Used these parts:

https://www.amazon.com/dp/B003B01AHS/ref=cm_sw_r_other_awd_J4zPwbXMRS8WJ


https://www.amazon.com/dp/B008219OQ0/ref=cm_sw_r_other_awd_y.zPwb5VZZ0RN

Following this video:

https://youtu.be/wmqZkw8hK7M



Only thing I did differently was use the dash mountable female 3.5mm jack, I just drilled a hole through plastic on the face plate, making sure not to hit the PCB

Sure. Factory part number is MZ360135EX. Give that to your dealer, or it's $20 + shipping on Discount Mitsubishi Parts and $27 on eBay. Here's the generic version for $15 on Amazon. They should all work with both the standard and the Rockford Fosgate systems. (Mitsu also had a factory iPod adapter with the old 30-pin connector on it, but it was over $100, and with iPhones switching to the new lightning connector, it's already almost obsolete.)

I personally went with the factory aux jack because a dealer near me had it in stock for a fair price and I wanted it that day. I followed these instructions on Club4G. Here's a video, too, if you get confused.

I'd get one and install it as soon as possible. It was one of the best, cheapest mods I did to my Eclipse before I sold it. FM transmitters suck.

By the way, to switch to the Aux input, you press and hold "CD" for a few seconds.

EDIT: Also, I ran the wire in the center console and up through the center console storage. There's even a little cutout for wires to come out of the armrest/storage box. I also put in a cigarette lighter in there since there's a factory cutout for one, that way I could charge my device and have the factory one free.