Ok guys, I am going to put the car in the garage for an entire week. Do exhaust, gaskets here and there, fix any electrical issues, detail, etc.

I had BRK LT CIRCUIT... FOREVER... replaced the brake light switch, it won't error until maybe 10 or so minutes (15 perhaps) of driving, then DING. Also, I have WASHER FLUID LOW, even though its full. Another one I get is "PARKING LIGHTS" but I have my turn signals all wired correctly... I do, however, have my side molding lights unplugged. Meaning my bumper trim lights do not light... but I don't think that's an issue with OBC read out. So is my Check Control Module failing or what? Could I switch the module out of my sisters 1995 530i into my 1992 525i or will that blow something up?