Genuine OEM Audi Air Filter Sealing Ring, part number 05L129636. This small but crucial sealing ring is located within the air intake system, specifically sealing the connection for the air filter. Its function is to prevent unfiltered air from bypassing the filter and entering the engine, protecting internal components from contaminants. Weighing 0.0029 kg and measuring 55mm x 55mm x 3mm, using a genuine OEM sealing ring ensures a perfect fit and durable seal, maintaining optimal engine performance and longevity.