The most valuable insurance policy in a serious car crash is usually the injured person's own, and almost nobody knows it. This article explains why, and what the coverages on a standard auto policy actually do. It works through liability limits and why they are so often inadequate, uninsured and underinsured motorist coverage and the stacking rules that multiply or restrict it, and the medical payments and personal injury protection coverages that pay regardless of fault. It explains total loss valuation, the diminished value claim insurers rarely volunteer, and the rental and towing coverages people pay for and forget. It covers the exclusions that surprise policyholders — household, permissive use, business use, and delivery driving — and the notice and consent conditions that forfeit coverage when ignored. It closes with policy limits demands, bad faith exposure, and the liens that determine what an injured person actually keeps.