Passenger injuries in a single-vehicle crash

You were in the passenger seat. There was no other car. The person driving is someone you know, and possibly someone you love, which is the reason most people in this position do nothing until it is too late to do anything. This is general information, not legal advice.

The claim is against an insurer, not a person

A passenger is almost never at fault for how a vehicle is driven, which makes this one of the clearer positions to be in on liability. The discomfort is social rather than legal.

What actually happens: the claim is presented to the driver's liability insurer, the insurer investigates and evaluates it, and the insurer pays within the policy limit. The driver's role is to report the crash and cooperate with their own carrier — which they are required to do anyway. They do not pay out of pocket unless the claim exceeds the coverage. That is precisely the risk the premium was buying.

The unwelcome part is worth saying plainly: not claiming does not protect the driver from anything, because the insurer has already been paid to bear it. It only means your treatment goes unpaid.

The household exclusion

One real obstacle. Many personal auto policies exclude coverage for bodily injury to the named insured and to family members residing in the same household. If you were riding with a parent, spouse, or sibling you live with, the liability coverage may not respond at all.

Where that happens, look for other coverage before concluding there is none: medical payments coverage on the same policy, which is no-fault and pays regardless; uninsured or underinsured motorist coverage where another vehicle contributed; health insurance; and any separate policy in the household. The answer is in the declarations page and the policy form.

How to read a declarations page · medical payments coverage.

One vehicle does not mean one cause

Before accepting that the driver is the whole story, the possibilities worth checking are:

• A phantom vehicle. A driver who forced the car off the road and did not stop. That is a hit-and-run in substance even without contact, and it can bring uninsured motorist coverage into play.
• The roadway. A shoulder drop-off, standing water from a drainage failure, a missing barrier, an unsigned curve. A claim against the responsible public entity has a much shorter deadline.
• The vehicle. Tyre failure, a defective restraint or airbag, a roof that crushed in a rollover. Product claims need the vehicle preserved, and vehicles get salvaged quickly.
• Maintenance or repair. A shop that worked on brakes, steering, or tyres shortly before.

The common thread is that all four depend on evidence that disappears — the vehicle above all. Tell the insurer not to release it for salvage until it has been examined.

Hit-and-run crashes · claims against a government entity.

Seat belts

Expect the question. Not wearing one can support a reduction, but only for the injuries the belt would have avoided or made less severe — and the defendant carries the burden of proving what those would have been, with expert testimony rather than assertion. It reduces; it does not bar.

Sources: CACI No. 712 (affirmative defence — failure to wear a seat belt; the defendant must prove the injuries "would have been avoided or less severe" with the belt), Judicial Council of California Civil Jury Instructions (2026 edition); Housley v. Godinez (1992) 4 Cal.App.4th 737, 747; Veh. Code, § 27315(i).

If you were in a rideshare

A passenger in an Uber or Lyft is in a different and generally better position, because the platform's commercial coverage applies during the ride. That is at rideshare passenger injuries.

Common questions

I do not want to sue my friend. Is there another way?

The claim is made against the driver, but it is paid by their liability insurer, which is what that coverage exists for. Your friend does not write the cheque. Most of these resolve without a lawsuit being filed at all, and the driver’s practical involvement is usually limited to reporting the crash and cooperating with their own carrier.

Can I claim if the driver is a family member I live with?

Check the policy before assuming. Many personal auto policies contain a household or resident-relative exclusion that removes coverage for injuries to family members living in the same home. It is a common and unpleasant surprise, and it is a document question rather than a rule.

Nobody else was involved. Does that mean nobody is responsible?

No. A single-vehicle crash means one vehicle, not no fault. The driver may have been going too fast for the conditions or inattentive. And the cause may lie outside the car altogether — a road defect, a tyre or component failure, or another driver who forced the vehicle off the road and kept going.

Does it hurt my claim that I was not wearing a seat belt?

It can reduce it, but only for the harm the belt would have prevented or lessened, and the defence has to prove that with expert evidence rather than assert it. It does not bar the claim.