If you look in the service book provided with the vehicle there will be a mileage based figure - typically 80k miles. (I'm not going to give a definitive figure - you must check).
However, the importers in Milton Keynes have been pushing scrappy bits of paper around advising a 4 year belt change interval at some lower mileage figure. As it's a source of revenue, the dealers are keen to promte this.
To my knowledge, nowhere else on the planet is a 4 year change interval stipulated, so in my view this recommendation is an MK sourced scam. It's a neat one as it doesn't materially affect the fleet markets who offload within 4 years, but capitalises on private owners' wish to "care" for their vehicles. MK are well aware that vehicles older than 4 years are seldom seen by franchised dealers.
So, draw your own conclusions. My PD is entering its 6th year on the original belt which will be changed shortly, together with the water pump and all idlers. I have inspected the belt minutely and it is in perfect condition, of large size for its duty and made by a reputable supplier (Continental). If anything, the water pumps VAG fit are less reliable than any other part of the system as the plastic impellers break up - fit a pattern replacement with a metal impeller.
My recommendation would be to work well within the stipulation of the service book supplied with the vehicle and to change the full kit including water pump. Get a trusted independent to do the work.
Yes I have just taken the second timing belt of an 02 1.9PD at 122,000 and the belt and the pump were in excellent condition. I have a US Passat manual and it clearly states 60K and 48 months. Regards Peter
The interval on my 05 105 1.9TDi Golf is 80k miles (as per service book).
If/when you get the car, a VW dealer can look up your engine code from the car reg. to tell you the specified mileage interval for your particular engine, as codes can change during a model's life.