Even IF the pump isn't a knockoff.. Prothe has been known to sell genuine BOSCH pumps that will never run an engine again..I personally wouldn't spend the cash on a Prothe pump, but instead find yourself a mechanical pump off of a 200/300TDI Land Rover in Europe. Almost a straight bolt on and go affair, it is what I run now on my AHU M-TDI.
dude just give up on proethe inless you really like fixing your car.
...BTW your Bieber avatar is awesome.-Malone
The AHU head will interchange with the 1Z. Boraparts sells complete NEW OEM AHU heads for $950.