Hi there, I am hoping someone can help me with my 2005 prius with smart keys. I started having trouble with the electronics (slowly the smart keys stopped working) along with some other strange phenomenon. I took the car to the dealership and they told me I needed to replace the aux battery in the rear. I did so, replacing with an OEM from Toyota dealership. The trouble is the smart keys still do not work with the car and I am wondering if there is anything I am missing? Do they need to be reprogrammed after the installation of a brand new battery? Has anyone had any similar problems? I had the bettery tested by another shop and they confirmed that it was indeed bad. Any help would be greatly appreciated!