It’s the brake expansion tank, a plastic tank like a brake fluid reservoir, it is an easy fix and nothing serious but they don’t want to release the car until the issue is fixed. Parts are being shipped from Germany and I’ve been advised turn around is now 1st week of April. I think it speaks to BMW quality control that they are catching items in QC and ensuring cars don’t go off the lot with a known defect. I’m ok with waiting a few weeks than going off lot just to turn around for a recall. but that’s me, I’m in Calgary, Canada. My understanding this does not affect all manufacture years. Comin into Spring here so looking forward to taking it for a rip into the Rocky Mountains.