I have the same problem with my 2005 Mazda3
It would happen, and eventually go back to normal after a few hours/days. Then things would be fine another few months. Its back, and it seems permanent.
Not the most mechanically inclined, but I pulled apart the front 2 doors. All doors lock fine electrically, only the drivers will unlock electrically (FOB, or buttons). I hear no motor noises in the other doors when trying to electrically unlock. There is no mechanical movement in the locking mechanisms when trying to electrically unlock. Connnections in the doors seem fine (driver/passenger door behind panel near the electric locking motor) Fuse is intact.
Given the intermittant problem initially, I am thinking electrical problem between the drivers motor and its connection to the other doors (through the passenger door?)
Additionally, using the passenger electrical button will lock, but not unlock, and no noise is heard from inside the panel when trying to unlock.
Thursday, September 17th, 2009 AT 11:12 PM