Replace BMW Key Battery If your BMW key isn't opening your vehicle or turning the engine, it may be the time to replace your battery. Fortunately, it's an easy fix. It's as easy as removing the key fob, then replace the battery and gently place it back. Follow these steps https://carkeyreplacements17525.blog5.net/72432448/11-ways-to-fully-redesign-your-bmw-3-series-key-fob