10.3 Part C UM/UIM and Part D Damage to Your Auto
Key Takeaways
- Part C uninsured motorists pays compensatory BI (some states also PD) when the at-fault driver has no liability insurance, is a hit-and-run, or the liability insurer is insolvent or denies coverage.
- Underinsured motorists applies when the at-fault driver has liability insurance that is not enough; stacking of UM/UIM limits is state-varying, and disputes often go to arbitration.
- Part D collision is upset of the auto or its impact with another vehicle or object; Other Than Collision (comprehensive) is the named OTC list, including theft, flood, hail, vandalism, falling objects, and contact with a bird or animal.
- An animal strike is OTC, not collision—the classic classification trap; OTC often carries a lower deductible than collision.
- Part D pays actual cash value minus the deductible and does not pay betterment; transportation expenses typically wait longer after a total theft (commonly 48 hours) than after other covered Part D losses (commonly 24 hours).
10.3 Part C UM/UIM and Part D Damage to Your Auto
Quick Answer: Part C Uninsured Motorists (UM) pays compensatory bodily injury (and in some states property damage) when the at-fault driver has no insurance, is a hit-and-run, or the liability insurer is insolvent or denies coverage. Underinsured motorists (UIM) is the too-little-insurance cousin. Part D splits collision (upset or impact with another vehicle or object) from Other Than Collision (OTC) / comprehensive (theft, flood, hail, vandalism, falling objects, contact with a bird or animal). Transportation expenses typically wait 48 hours after total theft and 24 hours after other covered Part D losses.
Assignment 2 items fail people who treat UM as “when I am not at fault” and collision as “when two cars touch.” The form is more precise than that.
Part C: uninsured motorists
Part C agrees to pay compensatory damages an insured is legally entitled to recover from the owner or operator of an uninsured motor vehicle because of BI caused by an accident. Some states add UM property damage; do not assume PD is in every PAP. Punitive damages are often excluded.
An uninsured motor vehicle is typically:
- A vehicle with no liability bond or policy that applies.
- A vehicle whose insurer denies coverage or becomes insolvent.
- A hit-and-run vehicle whose operator or owner cannot be identified. Many forms still require physical contact for hit-and-run; some states relax that by statute. If the stem is silent, teach the ISO contact idea and flag the state overlay.
- Sometimes a vehicle with limits below the state’s financial-responsibility amounts—a phantom of “insurance” that does not meet the FR floor.
Who is an insured for Part C tracks the liability household more than a random passenger in a stranger’s car: you and family members, any other person occupying your covered auto, and persons entitled to recover because of BI to those insureds (wrongful-death beneficiaries).
Exclusions worth the exam: UM on a vehicle the insured owns that is not a covered auto; using a vehicle without reasonable belief of permission; public/livery; settling with the at-fault party without the insurer’s consent in a way that prejudices subrogation.
UIM, stacking, and arbitration
Underinsured motorists is the fact pattern in which the at-fault driver has liability insurance, but it is not enough to cover the insured’s damages. Example: at-fault driver carries 25/50/25, is solvent, and admits the crash; your BI is $80,000; you carry UM/UIM 100/300. That is UIM, not UM. Calling it uninsured because “25/50/25 feels small” is the trap. 25/50/25 is still insurance, and it is not a national minimum.
How UIM triggers is state-varying. Difference-in-limits states compare the at-fault limits to your UIM limits. Damages-minus-limits states look at unpaid damages. Some states make UIM mandatory; some make it a rejected offer. Stacking—adding together UM/UIM limits from several vehicles or several policies—is likewise state-varying. Intra-policy stacking (two cars on one PAP) and inter-policy stacking (two households’ policies) are not ISO universals. If the stem does not give a statute, say stacking depends on state law and the form, and do not invent a nationwide stack.
Arbitration. If the insurer and the insured disagree on whether the insured is legally entitled to recover from the uninsured/underinsured driver, or on the amount of damages, the typical PAP sends that dispute to arbitration, not automatically to a jury trial. Coverage questions (is this vehicle uninsured? does an exclusion apply?) can still be court questions. Do not treat every UM quarrel as an appraisal of a fender.
Part D: two insuring agreements, not one “comprehensive collision” blob
Part D pays for direct and accidental loss to your covered auto and to a non-owned auto, minus the deductible, caused by:
Collision — upset of the auto, or its impact with another vehicle or object. Rolling into a ditch with no other car present is still collision. Hitting a parked car is collision. Hitting a guardrail is collision.
Other Than Collision (marketed as comprehensive) — a listed set of perils, including missiles or falling objects, fire, theft or larceny, explosion or earthquake, windstorm, hail, water, flood, malicious mischief or vandalism, riot or civil commotion, contact with a bird or animal, and breakage of glass. If glass breaks as part of a collision, the insured may elect to have it paid as collision so only one deductible applies.
The animal-strike trap
The insured swerves, still hits a deer, and the front end is gone. Collision deductible $1,000; OTC deductible $250. New CSRs reach for collision because “the auto impacted an object.” The PAP lists contact with a bird or animal as OTC. The $250 OTC deductible typically applies. Hitting a deer is not an Act of God that voids Part D, and the deductibles do not stack on the same loss merely because someone is confused.
OTC often carries a lower deductible than collision because the perils are less driver-controlled. That is a rating and product design fact, not a law of nature—read the dec page.
ACV, betterment, and transportation expenses
Part D’s limit is actual cash value (ACV) of the stolen or damaged property, minus the deductible. ACV is typically replacement cost minus depreciation. The insurer will not pay to better the auto—installing a new fender on a rusted 12-year-old panel and charging the insurer for the value added. Custom equipment, electronic gear, and non-owned trailers have additional limits and conditions; do not assume a $4,000 stereo rides for free.
A non-owned auto for Part D is a private passenger auto, pickup, van, or trailer not owned by or furnished for regular use of you or a family member, while in your or a family member’s custody or operation. Collision and OTC on that borrowed car follow the broadest Collision/OTC on any of your covered autos, usually as excess over the owner’s physical-damage coverage.
Transportation expenses (rental or substitute transportation) are a Part D extra, typically a stated per-day and aggregate cap (ISO editions have used figures such as $30 a day / $900 maximum; endorsements can raise them). The waiting period is the exam distinction:
| Loss | Typical PAP waiting period before transportation expenses begin |
|---|---|
| Total theft of a covered auto | Commonly 48 hours |
| Other covered collision or OTC losses | Commonly 24 hours |
Teach those clocks as typical PAP structure, then read the edition. Theft waits longer because many stolen autos reappear in the first day or two. The rental clock is not “immediately at FNOL” unless an endorsement says so. Collision and OTC must actually be on the auto; Part A does not buy a rental car.
Workplace walk: hail punches a covered auto on Monday morning; the insured wants a rental Monday afternoon. Under typical structure the transportation-expense clock starts after 24 hours, not after the first phone call. A total theft reported Monday night typically waits 48 hours. That is Part D product knowledge, not customer-service generosity.
A named insured swerves but still hits a deer. The front end is wrecked. Collision deductible is $1,000; OTC deductible is $250. How does a typical ISO PAP classify the physical-damage loss?
The at-fault driver carries 25/50/25, is solvent, and admits the crash. The insured's bodily injury is $80,000. The insured carries UM/UIM 100/300. Which statement is most accurate?
A covered auto is stolen and not recovered, and the insured rents a substitute. Later the same year, hail damages another covered auto that also needs a rental. Both autos have Part D. Which statement matches typical PAP transportation-expense structure?
A 12-year-old covered auto rolls onto its side in a ditch. No other vehicle is involved. Repair would install a new fender worth more than the rusted panel it replaces. Which statement matches Part D?