Tensioner shock absorber?
 

Hi, recently bought an '06 S convertible, fixing the small items that were brought to my attention before i bought, one of them is a rattle in the engine compartment at low idle, said to be the tensioner for the serpentine belt, and i was given a tiny shock absorber as the supposed fix for that situation, can anybody verify the problem/fix for me? Is this a common problem, and how mechanically inclined does a body need to be to change-out this little shock absorber?
Thanks,
Tim

https://www.northamericanmotoring.co...placement.html

https://www.northamericanmotoring.co...e-century.html


Here is the parts:

https://www.ecstuning.com/Search/Sit...h/11288620210/

https://c1552172.ssl.cf0.rackcdn.com/1068083_x800.webp