Yes it will work. You must take out your radio. You accomplish this by taking out the radio cover. Slip your fingers through a crevice and pull gently out should come right off. Then get a cross screw driver to take out the screws that hold the radio to the mount. On the back side you will see some ports where you will fit the white yellow and red cables through it. But in order to do this you must acquire an aux chord guide to your radio. Its free on google you put in " 2009 mitsubishi outlander aux chord adapter guide" press on images you should find a how to.
It's pretty short.. maybe 2 feet.... If your media player has bluetooth....GOgroove SMARTmini BT ADVANCED Wireless In-Car Bluetooth FM Transmitter with Charging , Music Control and Hands-Free Calling for ANDROID , Blackberry & Windows Smartphones will be a much better solution.. it worked great in my eclypse.... good luck.
I'm pretty sure the 6-disc changer is required for this cable. I'm not aware of anything that will work without the model that includes the changer. Another option that I've used with success is the GoGroove FlexSmart....it has a line-in port and will broadcast over the radio and its signal is strong enough to drown out the noise in between stations.