Hi Brian,

The belt should be changed at least every 210,000km, regardless of time, so if it has not already been done, then it really should be. It's customary to replace the water pump at the same time as you need to remove the timing belt to get at it anyway, but there is no set replacement time for the flywheel, and there's no advantage to having it done at the same time as the timing belt really. I assume you're asking as it is a dual-mass flywheel and they can develop issues, but if the car is driving smoothly with no juddering or other strange noises or vibrations, then don't worry about having it done.