Can a car window break by itself?

Can a rock shatter a car window?

This means when it breaks, it shatters to avoid having large shards of glass cutting passengers. … Your car windows or back glass at some point are nicked with a rock. This most likely happens while driving and yes, rocks can kick up and hit the back of your vehicle.

What would cause a car window to shatter?

Extreme heat causes expansion. A crack or nick in your auto glass can grow as the glass expands under the heat. … After too much of this, the glass can completely shatter if it receives any type of shock or hard shake. Whether heat or cold, the process of thermal stress is a common cause of auto glass damage.

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