Does the 2003 Toyota 4Runner have a timing belt or chain?

If You have the 2003 Toyota 4Runner with a V6 engine then You will have a timing chain but the V8 engine model is equipped with a timing belt. If You've got the belt then keep in mind that they will usually need to be replaced every 60,000 miles as part of the typical maintenance. You don't want to wait for it to break before doing something about it because driving with a damaged belt can lead to serious engine damage. If You've got the chain then there is less to worry about as they're designed to last much longer than the belts. Proper oil changes can ensure that Your chain stays healthy and is less likely to wear down and break. -