You must file a report of a traffic accident occurring in California when:

Question

When you have a collision, report it to DMV within 10 days if anyone was injured (no matter how slightly) or killed. You or your representative must make this report whether or not you caused the collision, even if the collision occurred on private property.

Accepted Answer

You are involved in a collision and there is an injury.

Answer

Your vehicle fails a smog test.

Answer

You change your insurance company.