The passenger in a silver Vauxhall Vectra was seriously injured after the car collided with a parked car on Gainsborough Road, Corby.
The collision happened at around 5.30am on Sunday, 3 July. The 28-year-old man, who suffered serious injuries, was taken to University Hospital Coventry.
The alleged driver of the car, a 21-year-old man from Corby, was arrested on suspicion of driving while under the influence of alcohol and driving without appropriate insurance. He has been released on police bail.
A third person is believed to have been seen leaving the scene.
Anyone with information or who witnessed this incident is asked to call the Drivewatch Hotline on 0800 174615.