Well, I got the tensioner replaced when I bought the car at 40K miles. I took it in about 6-7 months because it did the same thing and they said it was not the tensioner. It was something else, and that is was not covered under warranty and I would have to pay lke $300-$400. So I said, no way, I'll just let it ride like that. The sound went away, and now it came back. But this time I have no more warranty, it expired. I am going to take my car in for an oil change next week and ask them to check my belts, tensioner, or whatever it is. If they say it is the tensioner, then I will tell them that they already replaced it and that even though my warranty expired, and that its is not my fault that it went bad after they replace it.