A customer car was damaged at your shop. What decides the outcome?

This is general information, not legal or insurance advice.

Who is liable when a customer car is damaged at a shop?

A shop holding a customer's car is a bailee with a duty of reasonable care. Once the customer shows the car was delivered undamaged and returned damaged, most US jurisdictions apply a presumption of negligence, and the shop bears the burden of proving it exercised reasonable care. Whether insurance then responds depends on which garage keepers form the shop bought.

The bailment rule is stated plainly in New Jersey’s Model Civil Jury Charge 4.41 (njcourts.gov), with a plain-English version at UpCounsel. Which coverage form answers afterwards — Legal Liability, Direct Primary, or Direct Excess — is covered in the garage keepers guide.

What evidence actually decides these disputes?

Timestamped condition evidence from before the work started, and a movement record for the visit. In the widely reported joyride cases of the last several years, the deciding evidence was vehicle-side or owner-side — a factory data recorder, a customer's dashcam, a GPS app on the owner's phone — not the shop's own records.

What are the real cases shops keep citing?

Darien, Connecticut in 2024, where a dealership service advisor totaled a $97,000 Camaro ZL1E on I-95 against explicit instructions and the car's own data recorder proved the joyride. Milford, Connecticut in 2024, where technicians damaged a customer's Subaru WRX during an unauthorized manual-transmission lesson. Silverdale, Washington in 2023, where a mechanic took a customer BMW past 100 mph and the customer's dashcam caught it. Wales in 2018, where a Porsche Boxster was driven to 89 mph, again on dashcam. And Naperville, Illinois in 2025, where an owner overseas caught dealership joyrides through his own GPS app.

The five cases, and what proved them

• Darien, Connecticut, 2024. A dealership service advisor totaled a $97,000 Camaro ZL1E on I-95 after being told explicitly not to drive it. The car’s own factory data recorder documented the run (Jalopnik).
• Milford, Connecticut, 2024. Technicians damaged a customer’s Subaru WRX while using it for an unauthorized manual-transmission lesson (Automotive News).
• Silverdale, Washington, 2023. A mechanic took a customer’s BMW past 100 mph. The customer’s own dashcam caught it (FOX 13 Seattle).
• Wales, 2018. A Porsche Boxster driven to 89 mph during a service visit, again proved by dashcam footage (Fox News).
• Naperville, Illinois, 2025. An owner living overseas discovered repeated dealership joyrides through his own GPS app.

Why is the shop usually the party without evidence?

Because shops instrument the building and customers instrument the car. Gate cameras, key boards, and job tickets describe the premises; they do not describe what a specific vehicle did between 6 PM and 7 AM. The car and the owner's phone both keep a record by default. The shop, by default, keeps nothing about the vehicle itself.

Consider what a typical file looks like when a customer calls on Monday about a scuff that appeared over the weekend. The shop has a job ticket, a key hook, and possibly a camera pointed at the gate. None of that answers the question actually being asked, which is about a specific vehicle over a specific interval:

The point is not that this log accuses anyone. The point is that it exists on the shop’s side of the counter, so a Monday-morning accusation has an answer either way. Most accusations are wrong, and right now they are also unanswerable.

Should a shop have its own movement record?

Yes, if the owner consents to one. A consented, time-boxed record of miles driven, after-hours lot exits, and charging sessions turns an argument into a document. It also protects the shop far more often than it exposes it, because most accusations are wrong and currently unanswerable.

Consent is the load-bearing word. A record collected without the owner’s authorization is both legally fraught and useless as trust-building; a record the owner explicitly turned on, and receives a copy of at pickup, is the opposite. That is why the whole model here ends at hand-back rather than running indefinitely — see how a Tesla owner grants and revokes access and our privacy stance.

What should a shop do in the first hour after a damage claim?

Stop moving the car, photograph it as it sits, pull the intake photos and the odometer reading from drop-off, identify every person who had the key, and notify the insurer before promising anything to the customer. Write down the timeline while people still remember it.

• Stop. Do not move the car again, and do not let anyone “check something” on it.
• Photograph the current condition before anything else changes.
• Pull the drop-off evidence: intake photos, video, odometer reading, signed intake form.
• List every person who touched the key, with times. Ask them the same day.
• Notify your insurer before you offer the customer a remedy. Which form you carry decides what you can offer.
• Give the customer the timeline you have. Silence is what turns a dispute into a review and a claim.

Long-dwell jobs carry a second failure mode

Cars that sit for weeks at body shops develop problems that have nothing to do with anyone driving them. Dead 12V batteries are a recurring theme on owner forums — one Tesla Motors Club thread is titled, flatly, “M3 been in bodyshop for 5+ months - both batteries dead” (teslamotorsclub.com). Sentry Mode makes it worse: it draws roughly 250 to 300 watts, about a mile of range per hour, and auto-disables around 20% state of charge — after which the customer’s expectation of a recording no longer matches reality.

A low-battery alert during a long collision job is not a security feature. It is the difference between handing back a car and jump-starting one in front of its owner.