A rental car is a car that is purchased to rent for a specific amount of time. In dreams, cars represent ministries.
Positive: Dreaming of a rental car could represent being in a ministry as a servant or being in one’s process. God is having you go through a process in someone else’s ministry before you can have your own.
Negative: In a dream if you have a rental car instead of your own car it could mean that you don’t have enough humility or character to keep a ministry going on your own.
(Proverbs 22:7; Acts 1:25).