How often does a timing belt need replacing?

My six-year-old Skoda Superb has done 34,000 miles. I have been told that I need to replace the timing belt and I presume the water pump, is this right?

Does my car need a new timing belt after five years?

My local Audi dealership wants to change my Q3 timing belt at five years. It has only done 29k miles. Surely the belt is dependent on miles rather than time. I was thinking of about 40k miles? Do you agree?