How do you replace the serpentine belt one a 1997 infinity qx4?

To replace the serpentine belt on a 1997 Infiniti QX4, first, disconnect the negative battery terminal for safety. Locate the tensioner pulley and use a wrench or ratchet to relieve tension on the belt. Remove the old belt by noting its routing, then install the new belt following the same path. Finally, release the tensioner to secure the new belt and reconnect the battery terminal.