I’m never buying a BMW again. I had an electric i3 which had an inverter (charger) failure. BMW wanted €12k to fix it. Thankfully an independent offered to do it for 4K. But BMW still wanted 3K just to plug it in and authenticate the new block. Nothing else, just “bless” it. Made the fix cost-prohibitive so we just had to scrap the car. The battery, which most people fear, was fine on this 8 year old car.