Part Number Match: Matches the specific identifier 80A121081DB listed in the product title for accurate selection. Model Compatibility: Fits the Q5 vehicle model as explicitly stated in the provided product description. Component Function: Serves as an engine coolant overflow hose to restore standard fluid management systems. Direct Replacement: Designed to function as a substitute part for the specific hose referenced in the title. Application Scope: Intended for use where the identified engine coolant overflow hose requires replacement on the Q5., Manufacturer: FILWY