Replace BMW Key Battery If your BMW key isn't opening your vehicle or turning the engine, it may be time to change your battery. Fortunately, it's an easy fix. All you need to do is take off the key fob cover, carefully remove and replace the battery, and put it https://carkeyreplacement84420.tribunablog.com/9-signs-that-you-re-an-expert-bmw-3-series-key-fob-expert-44534593