Dramatic pictures captured the moment passers-by stopped to help after a car caught fire outside Portfield retail park in Chichester.
Witness Jennifer Rowbotham said a breakdown driver and a Rolls-Royce staff member were quick to douse the burning car with fire extinguishers on Friday afternoon.
She said: "Flames were visible under the bonnet and the bumper melted onto the road.
"Luckily a Rolls-Royce employee and a passing AA patrol man stopped and lent a hand with some fire extinguishers, otherwise it could have got a lot worse very quickly.
"The fire service were called, who arrived quickly and managed to completely eradicate the fire."