Hi

If I use the remote on my Mazda 5 I can lock and unlock all doors without problems. If the doors are locked, I can manually unlock them with the slider on each door - all besides the drivers door. I can lock that one either with the remote or manually but once locked I cannot unlock it manually anymore. The slider wont move I can unlock it only using the remote...
does anyone have a clue what the problem might be?

 

I’d pull the door panel and see if there’s something broken on the inside of that lever. If the power lock/unlock is working it means the rod assembly still works fine.

 

when I lock it manually, I can unlock it a few times without any problems. but after a while it locks for good and eventually it unlocks only using the remote control

https://streamable.com/1mxbzd

 

Definitely seems like an issue with just the mechanical switch.... something is getting bound up inside of that thing.

Does pulling the door release not unlock it? I can’t recall from my 5, but that tends to be a safety in most cars.

 

No, it won´t unlock using the door release only. And yes, I do recall this as safety feature form other cars as well...