But liability coverage levels come in threes — you’ll probably see something like 50/100/50 up to 250/500/250 in typical policies. You can think of these limits like: individual injuries / total injuries / property damage. Insurers are a little more technical, calling them bodily injury liability, total bodily injury liability and physical damage liability.
Senior drivers are often eligible for retirement discounts, reflecting the lower average miles driven by this age group. However, rates may increase for senior drivers after age 65, due to increased risk associated with much older drivers. Typically, the increased risk for drivers over 65 years of age is associated with slower reflexes, reaction times, and being more injury-prone.
Providers can also offer sub-divisions of auto repair insurance. There is standard repair insurance which covers the wear and tear of vehicles, and naturally occurring breakdowns. Some companies will only offer mechanical breakdown insurance, which only covers repairs necessary when breakable parts need to be fixed or replaced. These parts include transmissions, oil pumps, pistons, timing gears, flywheels, valves, axles and joints. 
According to the Insurance Information Institute, in the United States in the early 21st century, about two-thirds of the money spent on premiums for private passenger auto insurance went to claims. More than half of this amount covered car damage. The rest covered personal injuries. The remaining third of the money spent on premiums covered insurance companies’ expenses—such as commissions, dividends to policyholders, and company operations—and contributed to their profits.
Liability auto insurance protects you from that worst case scenario by providing a cushion between your assets and the amount you’re on the hook for. For this reason, choosing the right auto liability limits is the most important part of your car insurance quote comparison. NerdWallet typically recommends having at least as much liability coverage as your net worth.