Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
Do you have the full model number? I'll see if I can pull up some diagrams for you, how big are these plastic pieces that fell off?
Okay these are called door guards, they are number three on this diagram. Unfortunately no the diagram is not very helpful on where these go but they go on the bottom of the door itself, they go right with the hinge connects, very difficult to explain these to you I hope the diagrams help though, let me know, thanks, Bryan
here is a link to all the diagrams, diagram link