Car Stereos: Corolla 04 Sony XPLOD, mp40, color codes

Question
Hey,
I got an used Sony Xplod CDX-MP40 from a friend and I want to install it in an Corolla 2004 with 6 speakers. I would like to know if Plug and play harness exist for this stereo and if yes where I could have it ? I'm not good with wiring so ... Plus Does it matters if I have 6 speakers ?

Answer
Hi David,
Yes, most definitely there is a harness adaptor available for your Corolla, but it's not quite plug and play.
There will be some termination required... but thankfully, the color codes are standardized, so you should find success simply matching color for color.
Any reputable car audio outlet should stock or at least be able to order the harness adaptor for you.
Just a note that this is the smartest way to hook up any stereo... it leaves the factory harnesses intact and makes it MUCH easier to retro-fit your vehicle should you sell it and want to keep the head unit.
Good luck!
S R