Having problems with your car is already a nightmarish experience, but in dreams vehicular mishaps signify much more than a looming oil change or balding tire. Vehicles often represent the physical body, yet they can carry emotional implications as well. Like dreams of a home, the appearance of the car represents your outward perceptions, and your inner feelings are represented by what's under the hood.
You might be driving a wonderfully looking car, only to realize the inside is a mess, or it doesn't function properly. This situation might parallel your internal feelings towards yourself. Sometimes in dreams about cars, you're seated behind the wheel and heading straight for a crash, this could signify feelings of powerlessness or a lack of control.