Thousands of pounds worth of damage was caused when eight vehicles were broken into.
The break-ins happened in Gaisford Road, Barns Road, Boswell Road, Beauchamp Lane, The Grates, Cardinal Close, Eastern Avenue and Herschel Crescent late on Tuesday and early on Wednesday.
Police have linked the incidents and want to talk to anyone who saw a white man in the area during the night.
He was 6ft, of large build with a bald head, but possibly wearing a cap or hooded top. He may have been riding a bike and using a torch to look into the vehicles.
Two CD players, a holdall containing sports clothing and 90p in change were stolen.
Pc Claire Maynard, from the Oxford Auto Crime Team, said: "In all only two CD players, a holdall containing some sports clothing and just 90p in change were stolen. However, thousands of pounds of damage has been done to these vehicles.
"We advise people to not leave anything of any value in their vehicles and to leave their glove boxes open to show there's nothing worth stealing hidden in the car."
Anyone with information can contact police on 08458 505505 or Crimestoppers on 0800 555111.
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