治真 4 Harness is very good quality with almost standard color codes, it was very easy to work DIY on car audio thanks to this harness, however the spacer is not as good as the harness, I wish if it's made from hard rubber instead of cheap plastic. I recommend to buy such harness, if you're welling to DIY car audio or installing non-genuine audio/navigation set. It'll save your car's original harness, your time and effort.