Police believe a white MG sedan was travelling south-west on Oswald Street in Victoria Park before colliding with an e-scooter rider at a roundabout on Hordern Street in Victoria Park about 4.20pm on February 2.
Western Australia Police said the 70-year-old man was taken to Royal Perth Hospital but died later as a result of his injuries.
Officers are still searching for the MG driver.
Anyone with dashcam vision or information is urged to come forward by police.
