Most of those errors do appear to be low voltage. I hadn’t driven the x5 for about two weeks. I idled an hour or so while washing it yesterday and drove around the block, then cleared codes. Today I cleared again and it’s just the gong and airbag warning. Maybe when I do the other rear door carrier, front passenger regulator and gong i’ll try doing the chopped old credit card trick on the airbag driver airbag.