(2018 cx3) One fob works great. Other doesn't work "electronically". I've replaced battery 2x. The buttons will not work to lock/unlock the car when outside of car and the tiny red light doesn't light up on fob. I can open car door ONLY with physical hard cut-key. I can turn on car by holding the keyfob to the ignition button, waiting until green and car will start. However, if I have key fob on the seat (not held up to ignition button), the car doesn't recognize it and the red lock light comes on. Its as if the car recognizes that the fob is broken so still allows me to turn it on by holding the dead fob up to the ignition button. Otherwise, the electric chip/board inside the fob isn't "talking" to the receiver in the car for "key-less" use. Does it need to be reprogrammed or is it shot? If it is reprogrammed, will the car assume I'm reprogramming both fobs? I don't want to lose connection with my working fob. Worst case scenario, I have one fully-functioning fob and other that is manually working by not electronically working.