Product review (5 stars): Simple and easy DIY replacement.
Does exactly what it's supposed to do.

Replacing took exactly 5 minutes:
Simply unscrew the 3 hex-screws holding the top hinge, lift up the door, and replace the pin from within the metal bracket attached to the fridge frame.

Before you buy this, make sure the other half of the hinge is still in good condition, if not you should consider buying the 2nd half as well.
http://www.amazon.com/gp/product/B001EYH46O