My thought exactly, and i can see that little black bushing ring behind the pulley which looks to be on the ends of the hydraulic cylinder.

I have 70K miles on it, but I just replaced the serpentine 6 months ago (oem manufacturer but not oem) when i did the thermostat and water pump. I had a 2-3K miles on it which made me think it wasn't incorrect install or it would have failed much sooner. Just in case I was going to replace the pulleys this time.