It works fine for my system. I've known the guy I got the harness from for over 10 years and he knows his stuff. He also said that it will work for all coupes and 98% of verts will work also. I have a vert so he told me to try it first with an old HU to see if it would work. I don't really know why some verts won't work and neither does he but mine does so I don't care really. If you want some assurance call Metra and talk to their technical advisors and they will tell you exactly what you need. Metraonline.com