Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Body & Frame >> Mirrors >> Exterior Equipment >> 66 Exterior Equipment >> Underbody Trim Panel >> Rear Underbody Trim Panel, Removing And Installing >> Rear Underbody Trim Panel, Removing And Installing >> Tightening Specifications