How To Open Car Key Fob To Replace Battery. You have to open the key. After the key releases there will be a visible slot at the end of the key fob.
Depending on which car key you have you may need to lift out the circuit board of the remote to reveal the battery. The first thing youll need to know to replace the battery in your keyfob is how to open the Hyundai key fob. The battery will be flat and round like a large watch battery and stored in the head of the key fob.
Return the metal key back into its slot.
The following key battery replacement procedure is from the 2012 nissan leaf owners manual. You will then need a steady grip on your VW key fob for the next step. Make sure the new battery is facing the correct way. You should know that this process will be different depending on if you drive a new Hyundai model or an older one but not dramatically.
