Lewis-Evans crashed heavily at the dusty Ain-Diab Circuit during the season-ending Moroccan Grand Prix. His Vanwall's engine seized and sent him lurching into barriers at high speed, and his car burst into flames. He was airlifted back to the UK, but died in hospital of his burns six days after the accident. His death cast a pall over Vanwall's victory in the 1958 International Cup for F1 Manufacturers, an achievement to which Lewis-Evans had contributed significantly. Vandervell never fully recovered from Lewis-Evans's death and withdrew from motorsport at the end of 1958.