Amazon.com: Evan-Fischer Brake Vacuum Pump compatible with Audi A4 / A4 Quattro 05-09 / TT Quattro 09-15 : Automotive
Audi Workshop Manuals > A4 Mk1 > Brake system > Brakes, hydraulics, regulator, servo > Electric vacuum pump > Removing and installing electric vacuum pump
How To Replace or Reseal Brake Vacuum Pump - YouTube
How I deal with loose nipples...vacuum pump repair | TDIClub Forums