I purchased a new 1.9jtdm 150 back in Oct 06. My first Alfa.
I had it for 4.5 years and had a couple of problems.
Suspension bushes/arms were changed under warranty just before it was 3. I have to drive over a number of speed bumps (10 - 14 depending on my route) on my road every day
. i suspect this increased the wear on the bushes.
Had the heavy clutch problem and the dealer changed the clutch under warranty (2.5yrs old) but it didn't fix the problem. They told me it was ok so i just put up with it.
I have read on here that it was probably the bearings on the clutch lever shaft through the gear box casing (i think)
The worst problems were just out of warranty. First my EGR valve seized (£300 ish - main dealer) then 1 month later it needed a new inlet manifold (£900 i think - main dealer).
I believe the EGR valve is the same as on vauxhalls and they have the same problems with theirs too.
I suspect the inlet manifold problem was due to muck and soot being disturbed when the EGR valve was replaced as the egr is bolted directly to it.
Unfortunately i hadn't found AO at that time so didn't know what to do or who to speak too.
I now know of a recommended independent Alfa specialist in my area so will use them when out of warranty.
I think my EGR & manifold problems were due to me doing mainly short journeys - 3 miles each way to work & back, all in stop start traffic. The worst type of journey for a diesel i have now found out.
The Giulietta D now has a regen sequence to get rid of all the muck if it needs it.
My consumption was about 32-34 on my short work journey, but I could get about 42-45 on a long run.
Even though i had these problems i still loved the car and don't regret buying it for one minute.
The engine had good torque and gave a good growl on hard acceleration.
It handled good round the bends too. It was also good to look at.
The few problems didn't put me off the brand either as i traded in for a Giulietta.