The poll of 3,000 motorists by an insurance firm revealed that head bang tops the injury list followed by a pulled muscle, and knocked elbows and knees.
A sprained neck and bodily harm caused by the gear-stick were also included in the poll.
More than half accepted being engaged in some four-wheel fondling and the back seat cuddling was the most popular spot, though six per cent admitted getting into action in front seat.
The most frisky in-car incidents seem to be reported from southwest England where 61 per cent confessed to some loving auto adventures.
Other confession who enjoys a rear-view rendezvous was they even like to do it with their favourite models of car.
Volkswagen camper vans came first followed by cars from Rolls Royce, Aston Martin, Land Rover Discovery and Volvo estate.
"I was surprised to see so many people admit they've used their cars in this way,” a major newspaper quoted the insurance firm's managing director as saying.
He added: "The results show people's passion is a spur-of-the-moment thing - it seems some people just can't wait for the bedroom."