Police are appealing for information about an incident in High Street, Epping, on Thursday, June 14, between 10.45am and 11.15am.
A 17-year-old boy from Waltham Abbey was walking along the High Street when a black Ford Galaxy made contact with him.
The car then turned around and drove directly at him, knocking him over.
He was taken to hospital with a broken wrist.
Anyone with information is asked to call Pc Jonathan Goulds at Loughton police station on 101 or Crimestoppers anonymously on 0800 555 111.