Changing timing belt with low mileage ?

I have a 1993 car with 20,000 miles and service center says the timing belt needs to be changed -- was changed once already about 6 years ago. Is this necessary.|||the official replacement time for timing belts is 7 years or 90,000 miles. the reason that they say seven years because over time the belt can become corroded or difficult. if the belt snaps you could possibly bend a valve or cause extreme damage to the car. i would reccomend to change the belt as a precautionary. it could save you a lot of money. |||the only way to find out is to open it and look at it.it is possible that it didn%26#039;t age well with only a few miles in the last 6 years.if you don,t change it and it breaks it can cost you and arm n a leg for the collateral damage it does, trust me I waited too long.|||It%26#039;s made of rubber and has sat idle for long periods of time. I would do it as it will provide cheap insurance. The thing could be dry-rotted, or just plain worn (stretched, etc.) The repercussions could cost thousands. |||time is harder on timing belts than mileage. rubber gets hard over time, and cracks. oil and antifreeze will damage a belt as well.