maf sensor

[m4ttyb62002]

Hi all,

i have ordered a maf sensor but the diameter of the sensor is to small for the air pipe so i sent it back ordered another from euro parts same thing is happening.

i have attatched pics to show i cant understand why its different did they change the pipe size on later models ? or do i need a different air pipe?

thanks 

audi a4 avant b6 2002 2.0ltr

[m4ttyb62002]

Sorted this problem now i took the sensor out the housing and replaced it in the old housing as they where a direct swap. still no idea why the housing is a diffrent diameter that still and probably will remain a mystery .

[Steve Q]

How odd. Do the part numbers match? 

[m4ttyb62002]

not on the the housing i can only think because there different makes the original is bosch but the sensors have the same part number