The key fob's battery lasts for approximately a year with normal use. When the battery is low, a message displays on the instrument panel. Follow these steps to replace it:

1. With the key fob placed button-side down on a soft surface, use a small flat-bladed tool or fingernail to release the bottom cover.
2. Remove the battery by carefully lifting it away from the front retaining clips.
3. Insert the new battery (type CR2032) with the ‘+’ side facing up.
   Note

   Tesla recommends using Panasonic CR2032 batteries. These can be purchased through online retailers, local supermarkets, and drug stores.
   Note

   Wipe the battery clean before fitting and avoid touching the battery's flat surfaces. Finger marks on the flat surfaces of the battery can reduce battery life.
4. Holding the cover at an angle, align the tabs on the widest side of the cover with the corresponding slots on the key fob, then press the cover firmly onto the key fob until it snaps into place.
5. Test that the key fob works by unlocking and locking your vehicle.