Product review (5 stars): Saved me from buying a new microwave
Saved me from purchasing a new microwave.  My Panasonic microwave was out of warranty by 3 months and the manufacture would not warranty the unit.  I found this replacement part and it works great.  Thank you.
It was easy to replace. The plastic trim around the inside of the door just snaps off and just a small spring holds the latch in place. I recommend making sure the switch that mounts on the inside of the casing is aligned with the latch.
You should be able to push the door shut.  If you have to slam it the latch will fail again.