Product review (4 stars): DIY part... much cheaper than having a pro do it.
Used this part to get our ice maker agitator working again.  It was seized up.  I only gave 4 stars, since the design seems vulnerable to rusting.

The original agitator rusted out after about 5 or 6 years.  So I expect this one to last about the same time.

I suspect the rust was the result of an extended power outage we had due to a hurricane.  So if we have another long outage, I will remove the ice before it melts, and try to dry the shaft so it doesn't seize up again.

Installation wasn't too bad. (diagnosing the problem down to the motor was the hard part)

Just remove the trim panel around the ice dispenser on the freezer door.  That lets you disconnect the various cables... remember where they go!

Then remove the ice bin inside the freezer door to get to the top of this motor.  That lets you remove the cover panel and drive shaft.

Lift out the bad motor, replace it with the new motor, reconnect cables, drive shaft, cover panels, etc.

Hope that helps.  Good luck!