In the Series 3 episode , '' Broken Arrow '' , Arthur drives a Ford Granada Mk.II but as it is in for repair due to accident damage , he is forced to borrow a friends customised Chevrolet Corvette C3 Stingray that he is trying to sell .
In the Series 3 episode '' Broken Arrow '' , he uses a Ford Granada Mk.II . 
 However , due to an accident , this car has to go in for repair and Arthur is forced to borrow a friend 's customised Chevrolet Corvette C3 Stingray that he is trying to sell .