Depending on the situation, the dream of being passenger in a car is both good and bad as per dream meaning and interpretation. If you are happy after the dream, then you can expect progress in life due to another person. It means you can trust someone and allow them to control your life. They might take you to your destination.
Dream of being passenger in a car and you are unhappy or horrified means you should take back the control of your life. Stop allowing other people to make decisions for you. The dream is a prophecy that if you let other people run your life then you will end in accident and hurting your future.