Will homeowners insurance cover a broken car window?

Generally not, as motor vehicles are usually expressly excluded from the scope of coverage of a homeowner's policy.

However, the comprehensive coverage on an auto policy may very well cover broken Windows, at least if it was broken due to a covered cause of loss. In fact, if it is the windshield that was broken, many States have statutes that prohibit insurers from applying the comprehensive deductible against the cost of repair or replacement.