Product review (4 stars): Not a perfect fit, but easily remedied.
It wasn't until after I received this heater kit that I found out that the actual heater kit for my refrigerator was obsolete. This heater element is 2" wider than the WR51X430 that was listed for my refrigerator. However, it was simple enough to remove the heating element from the steel mounting frame and install it in the existing mounting frame to retrofit it. The unit was easy to install and works great!