I had the same problem. how to reset the alarm? my unlock alarm key not working. last ride i can lock with alarm key. then, my brother open the door manually ( because long time didnt use alarm door due to lock not functioning automatically. have to lock manually each door 1 by 1 ) and the alarm sound. we cant disarm the alarm system using alarm key. and now the car still armed, cant start the engine. is there a way to reset it ? btw, we just change the battery of the key.
(sorry broken english).