This is well documented in the FAQ. I agree with Tom:
Tom Larkins said:
Depending on where you get it serviced anywhere from 1,000 to as much as 1,500 bucks.
Keep in mind that this figure is ONLY for replacing the timing belt and water pump. There are other services that are also normally done at the same interval (90K miles or 6 years, whichever comes first, on the '91-96*), including air filter, valve adjustment, oil/filter, transmission fluid, brake fluid, etc. Those other services typically cost $800-1000 when performed separately. Those who claim quotes of $2500, and those who are referring to a "90K service", should make sure that they are comparing apples with apples, by specifying whether or not all those other services are included in the cost.
*On the '97+, the timing belt interval is 105K or 7, which is an interval for replacing the coolant.
chiludo67 said:
Yup, 120k coming up in 2005.
The 120K service interval recommendation is the same as the 60K service, and does not include replacing the timing belt and water pump.
chiludo67 said:
A friend of mine claimed his cost was $2500! YIKES!
For a full 90K service, including the timing belt and water pump, that's a fairly typical cost. Remember, you only have to do this every 90K miles.