How To Change Car Key Battery Bmw. Then your key battery is a standard thin button battery- replacable through the back flapdoor. These instructions apply when you change the key battery or your bmw key has stopped lockingunlocking the doors but the key starts the car.
Place the new BMW key battery in the place of the old battery. 2018 BMW X5. Remove the liner which covers the battery.
Activating Your BMW Remote Key Fob.
The first step is to remove the ventilation tray cover under which the battery is mounted. Then your key battery is a standard thin button battery- replacable through the back flapdoor. Remove the old battery. Do not force the battery in place.
