Q: Cam sensor going bad

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Hi peter, my sons cam sensor has been acting up, I took it to our local mechanic and they said they didn't have the computer that would reset the system if the new sensor wasn't recognized. I know I can change it, but I was wondering how often that happens. Never see it mentioned on youtube. BTW It is an MK4 later 1999 jetta

My car has 150000 miles.
My car has a manual transmission.

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