If your interior door handle on your 350Z ever randomly quits working, this is likely the culprit. When the small white plastic collets at the end of these cables break or the cable itself stretches too much, the interior door handle stops working and you can't open the door from the inside anymore.

Replacing the cable is as simple as removing the door card as well as the inner door skin panel, then unclipping the collet and removing the ferrule from its hole on the handle side as well as the latch side of the cable and then reversing the operation with the new part.

This cable is the same for both LH and RH sides.