Troubleshooting Problems With BMW Keys BMW keys were large black rectangles of plastic. They were inserted into the ignition to start and unlock the car. However, that all changed when the digital key came along. But is it possible to hack? You can use a keyfob which is not authentic https://thekeylab-co-uk49920.mybjjblog.com/what-s-the-reason-bmw-key-cost-is-everywhere-this-year-43457933