This part has been superseded by the new part number 19210-ZW9-A32.. Honda Water Pump Impeller - 19210-ZW9-A31. Restore strong, consistent cooling water flow with the genuine Honda water pump impeller, part number 19210-ZW9-A31. The impeller is a key wear item inside the water pump, responsible for moving cooling water through the engine. Replacing it on schedule helps maintain proper operating temperature and reduces overheating risk in both saltwater and freshwater use.. Superseded Part Number. 19210-ZW9-A31 has been superseded by 19210-ZW9-A32.. If you ordered or referenced 19210-ZW9-A31, the updated part number 19210-ZW9-A32 is the correct replacement and is used for fulfillment.. Key Features. Genuine Honda water pump impeller for cooling system service. Helps maintain proper cooling water flow and stable operating temperatures. Ideal for preventative maintenance and seasonal service intervals. Supports long-term reliability in harsh marine environments. OEM fit and function for c