The Ford Fiesta was found burning in Beaumont Road, Manor, at 1.50am.
Firefighters also dealt with a Fiesta set alight in Armthorpe Road, Wheatley Hills, Doncaster, this morning.
Doncaster crews have also tackled a skip fire in Coppice Road, Highfields and a wheelie bin set alight in Queen's Crescent, Edlington.
A pile of rubbish was set alight in Common Road, Brierley, Barnsley, at 11.25pm last night.
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Caravan and garage deliberately set on fire in Doncaster
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Anyone with information should call South Yorkshire Police on 101.