I have replaced more cam sensors then you can shake a stick at. Most go atleast 65,000 or so. I had 101,000 on mine before the first one went out. Havent heard any issues with the new ones.
FWIW: I've had the new grey ones garbage right outta the bag -
i had an orignal black one. (fatory, 10 years old, never once a hickup) took my truck in for some electrical work and they replaced it without me knowing. so i asked for my old one back and they lost in a 15min. time frame.
as of now i have had to replace that dam thing 4 times.
if your orignal one works fine dont get it changed.. just buy a spare just my .02 -