Three people knocked on a door of a house in Withybrook near Rugby pretending to need the toilet.
A woman and two men knocked on the door of the house in Kirby Lane, Withybrook and said they had broken down.
They said the women, who was pregnant, needed the toilet.
The resident at the house let the woman into the house and when she came back downstairs found the two men standing in her hallway.
A short while later the resident realised that her car keys and car had been stolen.
A spokesman for Warwickshire Police said: “Please do not allow anyone you do not know, or are not expecting into your home and please report any suspicious visitors or activity to Police on 101.”
Witnesses or anyone with information can call police on 101 or Crimestoppers on 0800 555111.