Pretty much what the title says. My daughter came inside and said her car wouldn't start so when we checked. 1) Couldn't unlock the doors using the keyfob (battery had been replaced already), however, she did use the keyfob to unlock the door first 2) push button did nothing, no dash lights, nothing 3) headlights wouldn't even come on 4) brakes stiff and wheel locked. The only thing I did after all that was disconnect the negative batt cable and reconnect, and after that everything started working again. Battery brand new, 12.6V. No idea. Possible security feature with this car and some sequence of events triggered it? Mystery to me. Slight correction, she said the keyfob worked to unlock the door prior to getting in, but after that, nothing. The keyfob stopped working, the push button stopped working etc, etc.