Officers attended a collision on Station Road, Westcliff, shortly after 5.20pm on Saturday May 23.
It was reported that a blue Mercedes CLK had struck a lamppost.
Two men are believed to have abandoned the car and left in the direction of Westcliff station on foot.
A third man, aged 22, was believed to have been in the car and was taken to hospital with serious injuries. He has also been arrested on suspicion of possession with intent to supply Class A drugs.
Anyone with information is asked to call 101 and speak to Stanway’s Road Policing Team. The incident number to quote is 873 of 23 May.
If you prefer to remain anonymous please call Crimestoppers on 0800 555 111.