How to keep my number plate when I sell my car ?

Hi Hana, the old car has to undergo PUSPAKOM inspection to determine the vehicle identity. For new cars, inspection is not needed except for imported cars.

You can read this link for more info: https://www.jpj.gov.my/en/web/main-site/kenderaan1-en/-/knowledge_base/vehicle/exchange-of-vehicle-registration-numbers-procedures