Audi A5/RS5/S5 Upper Inner Door / Window Seal Front, Left 8F0831721D

The upper inner door/window seal (OEM Part Number 8F0831721D) is a critical component located on the front left side of the vehicle. This weatherstrip plays a vital role in sealing the upper area of the doorframe, preventing water and wind intrusion into the cabin. It interfaces directly with the window glass, ensuring a snug fit that enhances acoustic insulation and protects the interior from debris. Common signs of wear include visible gaps, water leaks, or increased wind noise while driving. This part is an essential replacement for maintaining comfort and protection in vehicles. It is compatible with 2010-2017 Audi A5 (Quattro, Cabriolet), S5, and RS5 models, featuring various engine options such as the 2.0L L4 and 4.2L V8. Alternative terms include door seal or weather-strip on body. Ensure reliability with this genuine OEM part.