If you go to Toyota USA's FAQ site,
http://www.toyota.com/help/faq.html , and search for "timing" you will get this page titled "Timing Belt and Timing Chain":
http://toyota.custhelp.com/cgi-bin/t...i=&p_topview=1 , which shows that for your 2003 Land Cruiser, it is equipped with a timing belt (and not a chain).
According to the "Timing Belt Recommendations" page,
http://toyota.custhelp.com/cgi-bin/t...GltaW5n&p_li=# , the timing belt should be replaced every 90,000 miles OR 6 years, whichever occurs first.
You can also view your scheduled maintenance guide (usually called the "Passport to Performance") for your vehicle at
http://smg.toyotapartsandservice.com/ to see what other maintenance items (besides the timing belt) should have been performed and at what intervals.
When do you replace timing belt for 2003 Land Cruiser?
Linear Mode
