Replace BMW Key Battery If your BMW key isn't able to open your vehicle or turning the engine, it could be the time to replace your battery. Fortunately, it's a simple fix. It's as easy as removing the key fob, then replace the battery and gently place it back. Follow https://thekeylabcouk39537.onesmablog.com/five-tools-everybody-in-the-bmw-3-series-key-fob-industry-should-be-utilizing-70535669