I subscribe, what reference does the piece have? regards
Hi, the BITDI MAF has the reference 059906461
Q for the housing including the MAF element. The MAF element itself has an additional reference 420133471. However this same element is also used with the housing reference 059906461
N, which is the smaller diameter housing for the non Biturbo V6 tdi application. The use of the above element started I believe with MY 2009. In the Audi A6 the smaller diameter was used for example on the CDYA engine and the bigger diameter on the biturbo CGQB engine. Interchanging between CDYA and CGQB is no problem, because essentially only the housing is changed.
In my case I have a 2008 car with the 2,7tdi BPP engine. For this car the reference is 059906461
K. Here the MAF element itself does not show a separate part number. The MAF element looks very similar to the post-2009 element but does not seem to be immediately compatible. In the pics below you can see my BPP and CGQB MAFs side by side. (BPP left, CGQB right)
PS: By the way these are all Hitachi parts.