When booking in my car for a service the other day I was informed by the dealer that the cambelt should be changed because it's now coming up to four years old (Passat 2.0L petrol with 36K miles on the clock). I found this a little surprising because I didn't expect it to need changing so soon. However, a quick trawl on the web does seem to indicate that VW have now lowered the recommended cambelt change interval to 4 years or
60K (whichever comes sooner). But what I haven't been able to establish with any degree of certainty is whether this problem really just affects the TDI engines or all engine types including petrol engines. Can anyone shed any more light on this?