One problem related to power door locks not working has been reported for the 2004 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Kia Motor Optima based on all problems reported for the 2004 Optima.
Drivers side locking and not releasing. Numerous incidents where the drivers side door locks and will not release. (using the key on the outside or the pad on the inside door) I have repeatedly had to climb out the back door because the plastic pieces that were used when making the car are worn out and not allowing the lock to unlock. If there was an accident I would not be able to get out on the drivers side. I believe this is a manufactures defect. I am hoping that a recall or a silent recall will be issued for this since I am not able to open the door to get the door panel off to fix it.