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Event Data Recorder (Vehicle Black Box) Evidence

The crash data a modern vehicle records about itself in the moments before an impact - what the federal standard requires it to capture, who owns it, and who may retrieve it.

Informational only - this is not legal advice. These definitions explain general legal vocabulary in plain English. They are not advice about your situation, reading them creates no attorney-client relationship, and the law differs from state to state and changes over time. For advice you can rely on, speak to a lawyer licensed in your state.

What it means

Most passenger vehicles built in recent years carry an event data recorder, a function of the airbag control module that stores a short window of data around a crash: vehicle speed, throttle position, whether the brake was applied, steering input on newer systems, seat belt status, the timing of airbag deployment, and the change in velocity during the impact. It records continuously and keeps the data only when a crash or near-crash event triggers it. It does not record audio, video or location, and it is not the same as a telematics device or a connected-car service, which may hold far more.

Federal regulation does not require a vehicle to have a recorder, but where one is installed it sets what must be recorded, how accurately, and that the data must be retrievable with a commercially available tool. The result is that a recorder's data is treated in litigation as a reliable, objective record and is routinely used to test the accounts of drivers and witnesses about speed, braking and seat belt use. Retrieval requires physical access to the module and the correct tool; the data can be overwritten by a later event or lost when a vehicle is repaired, scrapped or sold, so a party who expects to rely on it usually sends a preservation demand quickly.

Under federal law the data belongs to the vehicle's owner or lessee and may be retrieved by others only with the owner's consent, under a court or administrative order, for traffic safety research with identifying information removed, for emergency medical response, or for diagnosis and repair. Many states have their own recorder statutes with similar limits, and some go further. The practical consequence is that an insurer or opposing party generally cannot simply download the data; they obtain it through consent, a subpoena or a court order, and an owner who destroys or lets the data be lost after being asked to preserve it risks a spoliation finding.

Where this comes from

The federal technical standard is 49 C.F.R. Part 563 (Event Data Recorders), which applies to light vehicles that are voluntarily equipped with a recorder and specifies the data elements, recording and retrieval requirements. Ownership and access are governed by the Driver Privacy Act of 2015, Pub. L. 114-94, title XXIV, subtitle C, §§ 24301-24303 (codified as a note to 49 U.S.C. § 30101). State recorder statutes include California Vehicle Code § 9951 and similar provisions in a number of other states; the sanction for losing the data after a preservation demand is a matter of each court's spoliation rules.

When people hire a lawyer for this

A person seriously injured in a crash should tell a lawyer immediately if either vehicle is still in a tow yard or an insurer's salvage lot, because the recorder is the one witness that does not remember differently later, and it can be gone within days. A vehicle owner who receives a request or demand for recorder data should not agree, refuse or sell the vehicle without advice: consent is one of the only routes to the data, and destroying it after notice can be worse than what it shows.

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Part of the LawyerLand plain-English legal glossary. Definitions are written from primary sources - statutes and court rules - and each entry states the authority it rests on, or says plainly when the doctrine is state law with no national rule.

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