Genuine OEM Audi Flexible Return Hose, part number 423422891D. This hose is a critical component of the power steering system, responsible for directing hydraulic fluid back to the reservoir. It is designed to withstand the pressures and temperatures associated with power steering operation. Constructed from durable, fluid-resistant materials. Genuine OEM hoses are manufactured to exact specifications, ensuring proper routing and resistance to degradation from power steering fluid, vital for system longevity and performance.