The 25-year-old suffered the ‘life-changing arm injury' and had his car stolen after being attacked by a gang of men when he pulled over on East Bawtry Road, Whiston at around 10:50pm on Sunday.
The driver, who was travelling alone, reportedly pulled over close to the junction with Lease Gate Road and was approached by a group of unknown men before being attacked with a metal weapon, severing his hand.
The attackers, who got out of a dark blue coloured vehicle, then left the scene in the victim’s white Mercedes Benz C220.
The victim was taken to Rotherham Hospital where a surgeon was able to re-attach his hand today.
"The surgeon has been able to save the man’s hand," a South Yorkshire Police spokesperson said.
"The officer in charge of the case said he was very lucky."
Josh Oxley, a friend of the victim, said he had pulled over to look for his phone which he had dropped somewhere in his car shortly before the attack took place.
He said: “He is not a bad person at all, he wouldn’t hurt anyone. He has got a heart of gold. He’s got a nice car so whether they have done it purely for the car, I don’t know.
“But he described it as a machete – you don’t chop someone’s hand off for the sake of nicking their car – it’s shocking.”
In a statement, South Yorkshire Police said: “The victim was taken to hospital with a life changing arm injury. He remains in a serious but stable condition.
“An investigation is under way and officers are currently following a number of lines of enquiry including reviewing CCTV and house-to-house visits.”
Anyone with information should call 101 and quote incident 985 of April 7 or Crimestoppers, anonymously, on 0800 555 111.