2005 Tacoma door locks won't work

So.. When I press the door lock button on my electronic keyfob never does lock all doors.. I got the locks replaced under warranty and they still are giving me issues.... 2 doors lock 2 won't.. If I bring it in to the dealer they should replace the locks because the work is warrantied correct?

 

I would think for a 2005 you would be wayyyy out of warranty.

Which two lock and which two do not?

When were they replaced before? Did they work after that replacement?

 

Drivers door and rear passenger door won't lock.

They worked after they were replaced for a while then failed again.. Maybe the keyfob is bad