These are the fake leather sensatec or something like that. I knew BMW wouldn't warranty them so I have a new cover on order from the UK. Unavailable in the USA.
I brought to an upholstery shop who told me they don't warranty anything interior. They don't even like to do the repairs and bring them to his shop. He offered to place additional foam padding to build up the bolster but I decided to buy a replacement cover and do the installation myself. This will give me a chance to find the seat temp wire and relocate it.
Since my first car in 1986 dealerships have not changed one bit. I am not confident any of the i3's warranties will be honored in the future. I'll enjoy this vehicle while it lasts. In the meantime I will take care of it as best I can. Just venting a little I guess.