Modern cars use the glass as part of the vehicle’s structural strength. A missing window can make the roof more susceptible to collapsing in a rollover accident.
Driving with a broken back window is not advisable due to safety, legal, and practical reasons. Addressing the issue promptly is the best course of action.
Use a heavy-duty transparent plastic (like a thick drop cloth or a specialized "crash wrap"). can you drive a car with a broken back window
Pull the plastic taut to reduce "flapping" noises, which can be incredibly loud and distracting on the highway. 5. Why You Can't Just "Repair" Back Glass
This is the most overlooked danger. Aerodynamics can cause a "station wagon effect," where exhaust fumes (including carbon monoxide) are swirled toward the back of the car and sucked into the cabin through the open window. Modern cars use the glass as part of
If the damage is extensive or part of a larger incident (like a break-in), contact your insurance company to see if the damage is covered and what the next steps are.
Tempered glass is designed to shatter into thousands of tiny, pebble-like pieces upon impact to prevent deep lacerations. Because it disintegrates entirely, you cannot "repair" a chip or crack in a back window like you can on a windshield; Conclusion Addressing the issue promptly is the best course of action
If you cannot get to a shop immediately and need to keep the elements out, here are temporary solutions:
Driving with a broken back window is a temporary emergency measure, not a sustainable way to operate a vehicle. It compromises the vehicle's safety structure, exposes you to exhaust fumes, and can result in a traffic ticket.
If you must drive before you can get to a glass shop, do not use cardboard—it blocks your vision and turns to mush in the rain. Instead:
Driving across town to the glass shop with a plastic sheet and duct tape is common, but is it legal or safe?