Timely post, just changed the MAF on my GT - however did not totally cure problem, so also cleaned out the ERG valve - different car! (Suggest anybody else who thinks the MAF is playing up to clean out this first as it costs nothing and then see if the MAF needs replaced, in my case the both needed sorting).
Got the MAF sensor from a local motor factors - ordered directly from Bosch £145 +VAT (hell of a lot cheaper than Alfa dealer wanted), this was for the sensor + housing.
There are 2 types fitted to the JTD GT's (CF3 and CF4) - the alfa parts cat lists the CF4 (0055183650, BOSCH 0281002792) but in my case it was the CF3 type fitted!
2005 GT CF3 1.9 JTD
Housing: (0046811122) BOSCH 0280218120
Will list the sensor # when I have a look at the old one, might help somebody else from ordering the wrong one too!!
Last edited by jr60; 26-04-10 at 13:01.