Hi,

I have a bit of an issue that passenger door does not open from the inside by pulling the latch, I can hear it doing something, but nothing is opening. However, it opens fine from outside.

Would anyone know what would be the issue and what part will be needed to replace? Need to source the part myself.

Possibly the hook on the release cable has either become detatched from the inner handle or the cable may have snapped. Door trim off and have a mooch around would be first point of action really

Aye,  very possibly the cable on the inner handle.  

Have fun removing the trim, particularly the main, long handle inside. I found the top section of trim on the handle could be removed using a credit card, sliding it along. It did less damage than other approaches (which I figured after damaging........).