A car in a dream commonly stands in for the direction your life is taking and how much say you feel you have over it. Driving smoothly can reflect confidence in your choices, while losing the brakes or riding as a passenger often points to autonomy that currently feels out of your hands.
Superiour Planets because they most resist, they do not easily receive a detriment or assistance from the Inferiour Planets. - William Lilly (1602.-1681.)