I've never heard of any Z owner installing Mirabox, but if you're trying to link it to the OEM nav system, I have some doubts it would work at all. Even trying to install the factory nav system into a Z not originally equipped with the DVD-based equipment has proven useless. Perhaps someone else can shed some additional light on this request, but the only thing I've heard is how much easier it is to use a standalone nav unit and integrate it into the dash. Cheaper and easier to get current map updates as well.