Driver's door lock not working

Using the key fob, only the passenger door locks and unlocks. I have to open using the handle and lock by pressing the lock button down. New lock I assume? any decent brands I should buy to avoid any issues later on?

Thanks

 

If its not working on the fob but other doors are its more than likely the door lock actuator on the iffy door, shouldn't be an expensive part and a simple fit.