Okay, a couple car beliefs from me:
*My brother and I tried to make the car fly when we went through a dip. We thought if we flapped our arms, even if fully inside the car, we could make the car fly when it came up from the bottom of the dip. We also got our cousin to do this whenever he was with us
*I was kind of perplexed about hazard lights until I was about 12. My first thought (until about 8) was, How do you turn left and right at the same time, and I thought you'd get pulled over for confusing the traffic. Then later on it was, How do you turn this off. I thought this when they were turned on and I was sitting in the driver's seat fiddling with the indicator control trying to turn it off. The inside indicator lights flashing just annoyed me more because I couldn't control them!
*Another belief I had: How in the world do the indicators no when to go on and off? Off, understandable, they click off when the wheel goes back. On, I just never saw my parents flip it as the turned the wheel.
A childhood belief about cars

others believed things like this
- Because of cartoons, I thought that to drive you'd just turn the steering wheel back and forth constantly. — Mitsuki
- I once thought that there were little mice under the wheel on Wheel of Fortune making the wheel move— Kara
- I used to believe that God controlled the traffic lights. He would decide when it was everybody's turn to go.— Amanda
- When i was little i always thought there were little men inside the traffic lights changing the light— Kiley
- I thought traffic lights were controlled by little men who lived inside them. Anon
- I believed that traffic lights had police officers inside them, turning the lights on and off...— CrowHeart