The Subaru / Robin 480-08010-09 Water Pump Impeller helps circulate water through compatible pump equipment during operation. It rotates inside the water pump housing to move water through the system and maintain proper flow. A properly functioning impeller can support consistent pumping performance and efficient water circulation. Replacing a worn or damaged impeller can help restore... https://www.wholetoolbox.com/subaru-robin-480-08010-09-water-pump-impeller/480-08010-09.html