Thanks, that might make sense. I've noticed that what passes for weatherstripping above the D pillar is torn, on both sides. IDK, maybe that's a red herring but still. I've already had the common TPMS sensor failure commonly thought to be...
Sorry to bring back old memories but I'm having the same issue you did but don't understand what the part was that you swapped. Google just says that the IHU is the head unit...do you have a part number? And how did you isolate the problem to...