When should my 2006 Volkswagen Golf's cam belt be replaced?

My Volkswagen Golf diesel 1.9 TDI is four years old with a mileage of 35,000. When should the cam belt be replaced?
Volkswagen's edict now says four years or 40,000 miles, whichever comes first. Before the edict, independents used to recommend 60,000 miles.
Answered by Honest John on

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