Troubleshooting Problems With BMW Keys BMW keys used to be large black rectangles of plastic. They were inserted into the ignition to start and unlock the car. The digital key changed everything. But is it possible to hack? You can use a keyfob which is not authentic to activate Comfort https://car-key-replacements39666.yomoblog.com/36410236/the-ultimate-guide-to-bmw-key-fob