Hey Issam, I'm always glad to help ... so let me explain the details of the install . . All you have to do is actually remove the shift console (but if you have never removed your stock shift knob then you will just have to work around it) and then remove the screws that hold on side pads and the you will be able to unscrew the panel where the start/stop button is located ... after that you just need to push in some side pins to get the button to slide out and unplug the harness and put in the new button. Then from there just reinstall everything and your done. If you need more help somewhere in the DIY section there should be a write up with pics .. and I'll post up more pictures to give you a better idea ...
Thanks .. Actually the GTR Button swap must be one of the easier mods I have taken the time to do on my car... It was childs play compared to removing the oem shift knob which was a real PITA !!!! If you decide to do it don't hesitate to ask for help ...
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