I have a 2010 mazda 3 sedan. The remote key fob locks all the doors but when you try to unlock the doors it unlocks 3 doors but not the driver's side door.The key also will not work in the driver's side door to lock or unlock it. Do I need to reprogram it? I saw a thread with 9 steps. The only problem is that I do not have a power door lock button on the door panel. The only thing that is there is the lock itself.

 

Replace or recode the door barrel 1st. Then check its operation, next recheck if this fixes the unlocking fault in the drivers door.

 

Thanks for responding. What is the door barrel?

 

The door barrel is where you insert the key for manual operation of the door lock.