Twood

This sits on the top of the left side of the motor-The front bearing had gone in mine and Porsche Australia wanted AUD$1400 for the replacement of the entire unit including the plastic cowling.
I was able to source (ex Germany) through Bosch the motor only at around 1/10th the price and installation involved removing the plastic cowling replacing the the motor and the reinstalling the cowling. Less than 20minutes.
So if you want to replace this motor the part number is 0 130 111 145-the Bosch part number is 0130111145775 and is available ex Germany.