Police were looking for a black BMW that was driven off from Bath centre with Katey Caven, 38, trapped in the back.
Avon and Somerset detectives said two passers-by dialled 999 after Mrs Caven shouted to them to call police before she was forced into the car and driven off on Wednesday.
About four hours later Mrs Caven telephoned her sister, and said she had been abducted by her estranged husband, Milton Caven, 39, before the phone was slammed down.
Police were anxious to trace Mrs Caven and her husband. Mr Caven is black, 6ft, with dreadlocks. Mrs Caven, of mixed race, is slim, 5ft 7in, with short burgundy-coloured hair and brown eyes. She was wearing a brown leather coat with a white fur collar and a grey jogging suit.Reuse content