Thank you all for your very useful feedback. I bought the batteries locally, so I'm pretty sure they work. I'll try disconnecting the car's battery for half an hour and see if it works. If still no luck then I think the BCM module might be toasted.
Hello all, I drive a 17 model Edge. Recently I can't lock/unlock the car remotely with my key fobs. I've changed the batteries in both fobs yet nothing seems to work. I can still access the car by pressing on the door handles.