My drivers side rear caliper froze one time, it was then unstuck and lasted about 4 months. It then failed for good and needed to be replaced.. The dealership for the part was close to $300 + labor.

I Googled how to replace it myself and it was shockingly easy. Bought my replacement caliper from Napa and was less than $80 after the core exchange. It's been 13 months and the replacement caliper still works great!