When should the timing belt be replaced on a 1999 VW Jetta Wolfsburg?

My car has about 90000 miles and i was looking to get the timing belt and water pump fixed, should i do it now and how much do you think it will run?When should the timing belt be replaced on a 1999 VW Jetta Wolfsburg?Should have done it 30 thousand miles ago, as far as cost for timing belt and kit around 350 dollars.When should the timing belt be replaced on a 1999 VW Jetta Wolfsburg?you should change it ASAP these belts are known to break before their service interval which is 80,000 miles so your on borrowed time, i work at a shop and have seen them break which costs upwards of 1,300 bucks minimum. if you get it done now i would estimate somewhere from 3-4 hundred dollars and the water pump is not part of the T-belt assembly but should be replaced at the same time as the t-belt must be removed to do the water pump