Home >> Audi >> 2021 >> S8 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Communication >> 91 Communication >> Sound System >> Left And Right Front Bass Speaker -R21- / -R23-, Removing And Installing >> Left And Right Front Bass Speaker -R21- / -R23-, Removing And Installing, 9VD+EP0 >> Tightening Specifications