What You Should Know About Black Boxes in Cars

by Aaron Gartlan

September 8, 2025 | Auto Accidents

You have likely heard of an airplane’s black box, which records flight data that is useful when investigating the cause of a crash. A flight data recorder is a critical device in aviation, capturing essential flight data and cockpit conversations for accident analysis. Many cars have similar devices called event data recorders (EDRs) that serve the same purpose, and these are now standard in most modern vehicles. Black boxes in cars can provide crucial information about a driver’s speed, steering, braking, and other actions right before a car accident.

Many motorists do not know about black boxes in cars, which may cause them to overlook a vital source of crash data. Most new cars sold in the United States since the mid-2000s contain an EDR, and the first car black boxes appeared in the mid 1970s but became more widely adopted in the 2000s. Knowing who controls this data and how to use it in a car accident claim is critical.

Do All Cars Have a Black Box?

No federal law requires every car to have an event data recorder (EDR). However, today, most automakers include them voluntarily. Most cars manufactured after 2014 contain a black box with features similar to those found in airplanes.

Generally, newer cars are more likely to have black boxes installed, particularly if they are from the last decade or have advanced safety systems. If your vehicle was manufactured after 2012, it is likely equipped with a black box. Vehicles manufactured after 2014 almost always have these devices. The black box module is typically located in the car’s center within the console or under the driver’s seat.

Older cars, especially those made before the early 2000s, are less likely to have one installed.

Many trucking companies use black boxes on commercial vehicles to monitor a truck driver’s actions and how a particular vehicle is performing on the road.

The presence of black boxes in cars is not always obvious, and many consumers are unaware that their vehicles have these recording devices. To determine if your car is equipped with an event data recorder, check the owner’s manual.

Types of Data Recorders

When it comes to understanding what happens during a car accident, several types of data recorders can provide valuable insights. The most well-known is the event data recorder (EDR), often referred to as a car’s black box. Installed in most modern cars, EDRs capture crucial information such as vehicle speed, acceleration, throttle position, and other key variables in the moments leading up to and during a crash. This black box data can be essential for car accident lawyers working to establish fault and support a personal injury claim.

While EDRs are standard in many vehicles, they are not the only devices that record data. For example, commercial vehicles often use additional data recorders as required by regulatory agencies. These can include GPS data loggers, which track a vehicle’s location and speed over time, and video event recorders that capture footage of the road and driver behavior. Some vehicles are also equipped with engine control modules (ECMs) and transmission control modules (TCMs), which monitor engine and transmission performance. The data collected by these devices can be critical in accident investigations and can help insurance companies and accident reconstruction experts correctly interpret the events leading to a crash.

It’s important to note that flight data recorders, commonly used in the aviation industry, serve a similar purpose for aircraft by recording data related to speed, altitude, and engine performance. However, in the context of car accidents, the focus is on automotive black boxes and related data recorders.

Accessing black box data or information from other data recorders often requires specialized equipment and, in some cases, a court order—especially if the vehicle involved belongs to another party. Insurance companies may request this data to investigate claims, and car accident lawyers can use it as valuable evidence in a car accident lawsuit. For commercial vehicles, data recorders are often mandated, and the data recorded can help improve safety and reduce the risk of future accidents.

If you are involved in an automobile accident, it’s essential to know what types of data recorders are installed in your vehicle and how to access black box data if needed. Seeking legal representation from experienced car accident lawyers can help ensure that all relevant data is preserved and used effectively to support your claim. Understanding the role of these devices can make a significant difference in the outcome of a personal injury case and help promote safer driving for everyone on the road.

What Information Can You Get from a Black Box in a Car?

The type and amount of information a car’s black box stores vary based on the vehicle’s make, model, and the specific configuration of the EDR. Some black boxes record only a few details, while others capture a wide range of data. Black boxes are designed to record information on basic variables such as speed, braking, and seatbelt use, which are essential for accident analysis and understanding the vehicle’s performance during an incident.

Due to privacy concerns, most black boxes record only a few seconds of data when activated. Still, even basic records can offer valuable insights into what happened before and during a car crash. Some examples of data a car’s black box could record include:

  • Vehicle speed at the time of impact – Speed data can help show whether a driver was speeding when the collision occurred.
  • Brake application – Data on when and how hard the driver applied the brakes can reveal if they tried to avoid the crash or failed to react in time.
  • Vehicle throttle position – Throttle data can show whether the driver was accelerating, coasting, or slowing down, which can support or challenge claims about aggressive driving.
  • Steering inputs – Black box data can help illustrate whether a driver attempted to swerve or correct the vehicle before the crash, which may indicate whether the driver was distracted or impaired.
  • Impact severity and direction – Knowing how fast the car was going and which side took the hit can support forensic recreations of how the crash happened.
  • Airbag deployment timing – Such data can confirm whether the car’s airbag system functioned as expected. If the airbag deployment data shows something did not work correctly, that information could indicate a mechanical defect in the vehicle.
  • Engine RPM – Advanced black boxes may record engine rpm to provide further insight into the vehicle’s performance and driver inputs at the time of the incident.
  • GPS location – Some systems also record GPS location to pinpoint the vehicle’s position during an accident or significant event.

The National Highway Traffic Safety Administration (NHTSA) requires EDRs to record a minimum of 15 data points, and the data collected is typically stored in the vehicle’s airbag control module. The recorded data can include vehicle speed, braking status, throttle position, steering angle, airbag deployment, and seatbelt status. Black boxes do not continuously record data; instead, they operate on a loop, overwriting old data until a triggering event occurs.

Most black boxes store data for a limited period, typically ranging from a few seconds to a couple of minutes before a crash. After a crash, black boxes usually retain recordings for approximately 20 seconds leading up to the accident. The recorded data is crucial for accident reconstruction, legal investigations, and insurance claims, as it helps determine what happened during a crash and provides a detailed record of the vehicle’s performance.

Who Can Access a Car’s Black Box Data?

In most cases, a car’s owner or the person leasing it can access the vehicle’s black box data, typically with the help of a trained automotive technician. Under the Driver Privacy Act of 2015, the data collected by an EDR belongs to the vehicle owner and cannot be accessed without consent. However, in many cases, car manufacturers, law enforcement, and other authorized parties may access black box data without the owner’s explicit consent, especially during accident investigations.

Insurance companies, law enforcement agencies, and car accident attorneys may seek the data during an investigation. Typically, they need consent or a subpoena. In legal proceedings, black box data is generally admissible as evidence if collected and handled properly.

Mechanics or crash reconstruction experts can extract black box data using specialized tools, but again, they need legal access. Data retrieval often involves specialized software and equipment, and a judge may allow access even without the owner’s consent if the vehicle is part of a criminal or civil case.

It’s important to note that black box data is regularly recorded over, so prompt data retrieval is essential to preserve this vital evidence.

How Could a Black Box Be Used in My Alabama Car Accident Claim?

Data collected by an EDR can provide valuable evidence about a driver’s actions or a vehicle’s performance before and during a crash. EDR data is beneficial if no eyewitnesses can testify about what happened or there is no surveillance footage of the crash.

For example, if the other driver claims they were driving under the speed limit, but the black box shows they were going 85 miles per hour in a 55-mph zone, that evidence could help you prove negligence. Or, if someone accused you of slamming on your brakes without warning, the black box data might show you braked gradually and tried to avoid the crash. Such information helps create a clearer picture of how the accident happened.

What Is Needed to Access the Other Driver’s Black Box Data After an Accident?

After a collision, you must meet two requirements to access another driver’s black box data. On the technical side, you need the right equipment, which typically means taking the car to a dealership or mechanic. Retrieving data from an EDR usually requires specialized forensic equipment like the Bosch Crash Data Retrieval (CDR) Tool. To access the data recorded by your car’s black box, a special data retrieval toolkit with appropriate software, hardware, and a cable that connects to the vehicle’s onboard diagnostics port is required. The data is stored in the vehicle’s computer, and data retrieval may require connecting to the vehicle’s onboard diagnostics port using these specialized tools. If the vehicle involved belongs to a company, they may consider the data their property, so notifying them to preserve the data or obtaining a court order might be necessary.

You also need the legal authority to review the other driver’s black box data. You can obtain this authority by seeking a court order. An attorney can put the opposing side and insurance company on notice to preserve the black box data, obtain a court order if necessary, and use the data as evidence in your case. It is important to seek legal representation to help you access black box data and ensure your rights are protected.

How Long Can It Take to Retrieve Black Box Data?

Retrieving black box data can take a few hours to several days. A trained technician with the proper equipment can usually download the data quickly if the vehicle is accessible. However, the process can take longer if the car is badly damaged, stored in an impound lot, or legal or insurance issues delay access to the black box.

What matters is that you act quickly after a crash to preserve the other car’s black box data. Otherwise, the data might be lost if the vehicle is repaired, crushed, or salvaged for parts.

What Is Black Box Insurance?

Black box insurance, or telematics insurance, involves an insurance company using an electronic device to monitor driving habits. The device tracks things like the driver’s speed, braking, mileage, and the times of day the motorist uses the vehicle.

Insurers use this data to assess driving risks more accurately. If you are a safe driver, you may qualify for lower premiums. However, this coverage is not without risks, as the insurance company will have detailed data on your driving habits. Think carefully about the trade-off before opting for black box insurance.

Contact an Alabama Car Accident Lawyer at Gartlan Injury Law

At Gartlan Injury Law, experienced Alabama personal injury lawyer Aaron Gartlan and our legal team always put our clients first, including conducting thorough investigations to support their claims. If you recently suffered injuries in a car accident in Dothan or elsewhere in Alabama, we can help you seek black box data and pursue full and fair compensation.

Contact us now for a free case review from an experienced car accident attorney.

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Aaron Gartlan is a graduate of Troy University and the Thomas Goode Jones School of Law who focuses his practice exclusively on representing those injured by the wrongdoing of others. He is member of the National Trial Lawyers Association’s Top 100 Trial Lawyers, Million Dollar Advocates Forum and Multi-Million Dollar Advocates Forum. In addition to his legal practice, Aaron teaches Business Law as an adjunct instructor at Troy University’s Sorrell College of Business and serves as a field artillery sergeant in the Alabama National Guard.

 

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