[840D]

Front n/s tyre warning alert then within 1/2 mile pressure dropped to Zero while driving, when both front tyres removed the inside edges had completely worn to the canvas and P zeros tread was delaminated. Vehicle owned from new 15k miles, BMW Sytner deciding if going to cover £100 cost for full alignment check and returning tyres to Pirelli for inspection.
So far not much help from dealer trying to say normal - don’t think so! 5mm tread depth across tyre, but inside edge (about 25mm) worn down to canvas causing complete pressure loss.
If you have an 8 series worth checking tyre wear inner edge as serious safety issue in my opinion - pursuing BMW for investigation and compensation.