Upper Radiator Coolant Hose Connector Pipe Adapter Compatibility Directly compatible with Toyota RAV4 model years 2009, 2010, 2011, 2012. Matches OEM part numbers: 165710V020, 165710V020, 1605736011, 1605736011. Key benefits — why you need it Restores reliable coolant flow to prevent overheating and reduce the risk of engine damage. Replaces worn, cracked, or corroded hose connectors to stop leaks and maintain system pressure. Helps the cooling system keep the engine within the correct operating temperature range, supporting consistent vehicle performance. Material and performance Made from quality ABS plastic engineered to withstand temperatures and harsh underhood conditions. Resistant to corrosion and aging for dependable, longterm use. Designed to maintain shape and sealing performance under thermal cycling common in cooling systems. Function and fit Serves as the upper radiator hose connector/adapter to join coolant hoses and routing components. Designed as a replacement for the specified OEM part numbers to ensure correct fit and function. Use with the vehicle's existing hoses and clamps; verify part number and shape against the original part before installation. Practical use scenarios 1. Routine maintenance: an aging or brittle upper hose connector during a coolant system service to prevent future leaks. 2. Leak : Swap in the adapter after diagnosing a coolant leak at the upper radiator hose connection to stop coolant loss and restore proper pressure. 3. Postoverheat recovery: a damaged connector following an overheating event to ensure reliable coolant circulation while confirming other cooling system components are intact. Notes Confirm compatibility by matching the OEM part number and the connector's form to your vehicle's original component. Professional installation is recommended if you are not familiar with cooling system repairs. This upper radiator hose connector pipe adapter is intended as a likeforlike replacement for the listed Toyota RAV4 parts and is designed to restore proper coolant flow and help protect engine temperature control.