Drive belt tensioner replacement question
 

Do u need to replace the whole tensioner assembly when replacing serpentine belt tensioner? Or just buy the tensioner and idler by themselves?

^
If you go to rockauto with 31170-RCA-A04, you can do either.
It appears associated drive belt tension parts are 'discontinued' via OEM?:shrug:
Alternator Bracket - 2007 Acura TL 4 Door BASE (NAVIGATION) KA 5AT (acurapartswarehouse.com)

i found em on anothr acura parts site. So the tensioner pulley and idler pulley is all u need for this.? No reason to buy whole assembly?

If the tensioner meets the 'test' criteria below, then just replace the pullies if they are noisy?:shrug:
https://cimg1.ibsrv.net/gimg/acurazi...31de4ddc50.png