How do you replace idler pulley on Toyota Sequoia 4.7?

To replace the idler pulley on a Toyota Sequoia 4.7, first, disconnect the negative battery terminal. Use a socket wrench to relieve tension on the serpentine belt tensioner, then remove the serpentine belt from the idler pulley. Next, unbolt the idler pulley using the appropriate socket, replace it with the new pulley, and reassemble by reversing the steps. Finally, reattach the serpentine belt and reconnect the battery terminal.