A silver Nissan Primera left the road in Crabtree Lane in Lancing on Sunday morning and crashed into the farden of a house in Boundstone Lane.
The incident occurred about 6.15am, police say, when the car failed to negotiate the left-hand turn in Boundstone Lane.
The driver ran from the scene. He was described as white, in his mid-twenties and wearing a light grey anorak.
There were not reported to be any passengers, police say.
Enquiries are being made to trace the owner of the car.
Sussex Roads Police had previously tweeted an image of an incident in Boundstone Lane on Sunday.
Police Constable Jon Bennion-Jones of the Surrey and Sussex Road Policing Unit said: “If you saw what happened or saw that car in the minutes leading up to the crash, please email [email protected] quoting serial 291 of 19/03.”
Members of the public can also report information online or call 101.
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