The intervals are all over the place. Here are the reasons;
60K=this was the standard for timing belts for years. It was a better safe than sorry for most cars. Some would start to break before, but most everything would last longer.
90K=new standard for belts. Chalk it up to better engine design, better belts, and more real world experience. This is when it's a good idea if you prefer maintence to repair.
100+=there are laws that state the Mfgr. must fix/replace stuff that affects emissions for this time. The Mfgr's decided that they would risk letting your timing belt go rather than replace them all. Look in some owner's manuals and you will see different lengths for different states.
Now, on to the question of why fix it if it ain't broke. If you drive until your tire pops, your engine overheats, etc. you can't be told it's wrong. If you are the type that makes sure everything is properly maintained so you aren't stranded, don't pay more for damage caused by failure and like the karma of a properly maintained car, do the service as stated in the book or sooner. It's Your Money.
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2004 Dark Plum Base with windows tinted, cabin filter, silencers removed, fog lights, 18\'s, all Red taillights, Blaine\'s struts, modesty cover, color-matched center dash, 06 rear bumper
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