Genuine OEM Volkswagen Air Filter Housing Fastening Bushing, part number 7L0198129A. This small, essential component is designed to securely fasten the air filter within its housing, preventing movement and ensuring a proper seal for effective air filtration. It works in conjunction with a screw to hold the housing in place. Measuring approximately 2.5 cm, this bushing is lightweight. Using a genuine OEM fastening bushing ensures the correct material properties for vibration dampening and durability, maintaining the integrity of the air intake system and protecting the engine from contaminants.