I'm sure you could do it your self. All you need is power and ground and run sensor cables through firewall into cabin to connect to CPU. Mine is mounted to the left of the speedo/dash. There is a little plastic piece that comes off where the door normally pushes up against, my CPU is in there. It's basically in the speedo assembly/box.
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2009 335i JB4 Retired
2013 335i M Sport JB4 Retired
2016 M3 Jb4 Retired
2019 Tesla Model 3 Performance Current
2020 M340i (Wife's Car)
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