I have a 2001 xc70 with only 41,000 miles. I am the original owner and the car has been garaged consistently. Volvo service says I need to have a timing belt replacement because the car is 10 years old, regardless of mileage. They want to charge $625. What do you think? The mileage seems really low for this. Is there anything else that should go with this if I do it? (any opinions from experts would be GREATLY appreciated!!) Thanks!