At about 8.30pm on Monday, police were called to the Hume Highway in Liverpool after reports of a man hit by a car.
A 62-year-old man was found lying on the road.
He was taken to hospital in a critical condition.
Police earlier this week released CCTV showing a silver ute and a black Mazda 3 as part of the investigation.
A 19-year-old man was arrested in Macquarie Fields yesterday at about 3.40pm.
He was charged over the incident and granted conditional bail to appear in court on May 29.
