The film star smashed the windshield with his head and flew 30 feet from the auto, Avlon said Clooney relayed to him.
The John Paul II hospital in Olbia said the actor was released on Tuesday.
"A auto (a Mercedes E SW) did not respect the right of way and hit him". "He is recovering at home and will be fine".
Police told AFP they were unable to comment while operations related to the crash were still under way. While it's possible that these details are rather exaggerated, considering TMZ's history of treating rumors as facts, there have been enough reports to verify that Clooney's accident was quite serious.
George and Amal Clooney just donated $100,000 to help migrant children separated from their parents. "It turns out he had a scooter accident with only minor injuries", while another added: "George Clooney should not be tampered with 2018!"
The north-east coast of Sardinia is popular with the rich and famous, although Clooney is on location on the island to film a new mini-series Catch 22. Photographs taken by someone passing the scene showed the car's front right bumper damaged and Clooney's bike on its side.