he serpentine, or accessory belt.
loosen the alternator and it will slide right off Check 2carpros.com for a belt routing diagram.
remove old belt install new belt you're welcome
A 1999 Jeep Wrangler has a timing chain.
A 2005 Jeep Wrangler has a timing chain.
how to install a drive belt on a 2000 jeep wrangler 2.5 liter