Genuine OEM Audi Ventilation Hose, part number 4M0121081AK. This component is designed to allow for the controlled flow of air or fluid within various vehicle systems, ensuring proper ventilation and pressure regulation. It is a small, flexible hose with a specific fitting for secure connection. Weighing approximately 0.0152 kg, it is constructed from durable, resistant materials. Opting for a genuine OEM hose guarantees correct routing geometry, material compatibility, and reliable sealing, preventing leaks and maintaining system integrity.