Now that the Doblo is 5 years old should I change the cambelt or leave it?

Speaking as someone who's had one break I would say change it! Mine on the Ford Courier 1.8 diesel should have been changed every 30,000 miles but as far as I know (assuming it was it's original belt) mine failed at about 60,000 miles and about 6 years.

Having read your reply has just reminded me the cambelt needs changing. Knowing Fiats reliability I had better not leave it to long.

I believe the cambelt should be changed every 72,000 miles on the 1.9 JTD.

I'm not sure about the time interval for low annual mileage vehicles as Mrs_G's Doblo gets a new cambelt every nine or ten months.

If I remember correctly the 3rd year 60000 mile service (which I'm due next year) is a big one and I think that they will change the belt then, along with filters, oil, etc etc

I checked when I bought mine, and Niall is right - 72,000 for the 1.9 JTD.

I'd get it done early rather than late, and willl prob book mine for it sometime shortly after 60,000 miles- afterall, its an engine killer, and the new one will last the same again.

Do you think it's worth me having mine done on the 3rd year service even though it'll only be after 25,000 miles?

I wouldn't change it that early - if its meant to be 72,000 I'd do it before 72,000 rather than after (unless Fiat recommend a time limit too), but by the same token you don't want the covers on and off the engine more than necessary - its all wear and tear and an opportunity for mechanical ****wittery by the garage.

Heh, automatic stars! I like it