Genuine OEM Audi Suspension Air Line Connection Piece, part number 4B0616751. This precision-engineered fitting is crucial for securely connecting air lines within the vehicle's suspension system. It ensures a leak-free seal, maintaining proper air pressure for optimal suspension function. Constructed from durable brass with a white plastic end and an O-ring, it is designed for reliable performance. Using a genuine OEM connection piece guarantees the correct thread, sealing properties, and material integrity, which are vital for the safety and longevity of the air suspension system.