Genuine OEM Audi T-piece, part number 059133537. This component is used to connect multiple vacuum or air lines within the engine's intake or boost system, facilitating proper air flow and pressure regulation. It is typically found in the turbocharger or intake manifold plumbing. Made from durable plastic or rubber, it is designed to withstand engine bay temperatures and pressures. Genuine OEM parts ensure a leak-free connection and correct flow characteristics for optimal engine performance.