After hundreds of posts about the belt and tensioner I'm amazed we still come back to it week in and week out.
If the noobs read half of those they would know that belt dressing does not fix the problem, further more it can even make it worse. That has been my experience the same as many other long time Gen7 owners.
New belt is the only fix, some have reported the Goodyear Gatorback belt lasting the longest. The toyota belt will continue to wear out over time again and again, I am on my 3rd.
There is no TSB that I know of on this, so once your out or warranty its your problem and your dime.
Can we talk about what the best exhaust and CAI
is. Please I never get enough of those, sheesh.