Ashir, thank you so much for your very thorough documentation! I was able to use your instructions to successfully install a slightly different head unit – the Joying 8.9, available here. The installation went smoothly except for one difference. Your instructions stated to use the Joying...
Picked up a 2005 Z4 a couple weeks ago and have been loving it so far. Took it for a very enjoyable top-down drive up to Idyllwild this past weekend and the weather was fantastic.
I stumbled on the forum while searching for hints on how to install a head unit with Android Auto / Apple CarPlay...