Install is pretty easy once all the prep work is done... so once you install it, update the firmware, uninstall the procede, add the wires then re-install in one sitting. With the harness ready for the reinstall and knowing that you are doing it the second time in a matter of an hour or so, it is very simple...
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2010 BMW M6
2007 BMW 335i,2012 Audi S4-retired
2016 BMW 750i M-Sport
2015 BMW M235i-retired, 2022 M240i
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