If an AI scanner fails to identify pre-existing damage on your rental car, you could be wrongly charged for repairs. She wasn’t familiar with the AI scanner, but she was about to get an unpleasant lesson on this new technology. Her Florida trip was smooth sailing — until Sixt’s AI scanner flagged her for causing rental car damage . Inspect the rental car for pre-existing damageThe first thing you must do before putting your belongings into any rental car is to thoroughly inspect it. Car rental customers should always have their own clear before and after photos or videos of the rental car.