If you are talking abut the line that goes from the VP44 to the third cylinder from the front of the engine, my parts catalogue shows part #05011459AA. You might want to double check with the dealer to see if this number is correct or has been superceded by a new number.
Also, if you would like a copy of the parts catalogue for your 2001 just PM me your email address and I will attach it to an email. It's in PDF format so you will need Adobe Reader.