How to Replace the Key Battery for a Focus?

[GiselleLee]

There is a downward-pointing arrow indicator at the side groove of the Focus key, which is the latch. Use a flathead screwdriver or other sharp tool to press down on the latch, which will pop open the cover. After removing the cover, you can see the battery. Replace it with a new one and put the cover back on.

[McBentley]

My Ford Focus key is the classic flip-key style, and replacing the battery is quite simple. First, locate the small gap near the keyring and carefully pry open the casing using your fingernail or a bank card. Be steady when prying to avoid breaking the plastic clips. Inside, you'll find a silver coin-shaped CR2032 battery, which is readily available at supermarkets or stationery stores. Before inserting the new battery, remember to wipe the battery slot with a tissue—sometimes poor contact is caused by dust. After installation, test the response by pressing the lock button a few times. Last time I replaced mine, I noticed the remote range improved. When closing the key casing, you'll hear a click, indicating it's properly secured. The whole process takes less than three minutes, saving both time and money compared to visiting a dealership.