Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Components (Brake System) (1 Of 2) >> 47 Hydraulic Components >> Vacuum System >> Vacuum Pump, Removing And Installing >> Vacuum Pump, Removing And Installing, 2.0L TFSI Engine >> Tightening Specifications