The symptoms you described certainly points to the BCM, but it is very difficult to accurately diagnose a problem remotely.

Have you checked / re-seated all the connectors to the BCM? 

I apologize in advance If this topic has already been discussed. Here’s my problem. I’m an OTR truck driver and am out for about a month at a time. I parked my mini at the truck stop for nearly a month and came back to a TOTALLY dead battery. Wouldn’t even make a sound when I put the key in. So, I jump started it with my wife’s car, and the these are the problems I had after it started…

Radio said “Disabled” NAV screen totally blank AC/Heat controls not working Turn signals on Gauge cluster not working Sunroof not working

I checked all the fuses and had to replace 1 fuse but it fixed nothing. It was probably a fuse that had nothing to do with my problems anyway.

Everything worked perfectly fine as far as driving, just no electronics at all inside the car. I replaced the battery so now I have fresh juice. I just wanted to see if anyone had this same issue. I’ve read online that it’s the BCM and found a place online that repairs them and sends them back and has a lifetime warranty. I’ll take any advice, comments, suggestions anyone has.

Thanks in advance

2004 Mini Cooper S