Changing the bearings during the idler pulleys and tensioner pulley will save you a bit $$ which is setting helpful. However, Toyota would not sell alternative bearings; It's important to buy the pulley with an set up bearing, or for that tensioner, you're forced to invest in all the assembly. https://snoopydirectory.com/listings749498/5-simple-techniques-for-debt-collection-in-anaheim