Replace BMW Key Battery It could be time to change your battery If your BMW key isn't able to open your car or turn on the engine. It's an easy fix. All you need to do is remove the cover of the key fob, carefully remove and replace the battery, https://thekeylab00877.life3dblog.com/29440718/5-must-know-bmw-key-fobs-techniques-to-know-for-2023