Swilley law Firm

What Does a Black Box Record in a Car and How Can It Impact Your Florence Car Accident Claim?

February 14, 2026
At Swilley Law Firm, we understand that navigating the legal system can be overwhelming and stressful. That's why having the right advocate by your side can make all the difference. No matter the complexity of your situation, you don't have to face it alone. Get in touch with us today.
Free Consultation
100% Secure and Confidential

client testimonials

Hear from our satisfied clients

Car accident cases require evidence to prove what happened. In South Carolina, an injured victim can only request compensation if someone else is liable for their crash. That means proving that someone else caused your accident, using solid evidence.

A car’s black box continuously records certain information about the vehicle. The technical name is an Event Data Recorder (EDR). Most cars will have an EDR installed, which can play a critical role in a personal injury case. What does a car’s black box record? In short, critical information about the vehicle right before an accident. Call Swilley Law Firm, LLC to discuss any accident. Our Florence car accident lawyer can discuss the steps we take to obtain compensation.

What Does a Black Box Record in a Car?

A car’s black box will record information it has been programmed to record, which might vary by car make and model. However, most EDRs record the following:

  • Vehicle speed
  • Steering input
  • Throttle position (i.e., how hard someone was pressing on the gas pedal)
  • Whether the brakes were used
  • Acceleration or deceleration
  • Seat belt use (was the motorist buckled in or not)
  • Airbag deployment
  • Change in velocity during a crash

What Does the EDR Not Record?

The black box does not record:

  • Conversations between occupants in the car
  • Video of the scene in front of or behind the car
  • Duration of the trip
  • Speed more than 5 or 10 seconds before the accident
  • Events happening long after the car accident

For example, an EDR is not a dashcam. It cannot record the events happening right in front of the vehicle. Instead, we recommend motorists purchase a dashcam so that they have video evidence, which might make all the difference in a T-bone or rear-end collision.

How We Use Black Box Data

These event data recorders contain a treasure trove of information we can use in a car accident claim. Our goal is to prove that the other driver is at fault for the crash and your injuries. We might also need to disprove any claim that our client was negligent.

For example, we can use the data to show that our client was braking or steering to avoid a crash, but the accident happened anyway. This could prove that our client was not negligent or distracted because they took defensive action.

We might use speed data to show that our client was not speeding in the moments leading up to the crash. This evidence can strengthen your claim and increase the amount of compensation you receive in a claim.

We also seek to get a hold of the other driver’s black box data. That data might show the other driver was going 20 miles over the speed limit, which is strong proof of negligence. Please contact Swilley Law Firm, LLC, as soon as you can.

Examples Where Black Box Data is Helpful

We can often use this information to reconstruct various collisions:

  • Accidents involving running a red light. The EDR might show the at-fault driver was accelerating and speeding in the seconds before they entered the intersection and collided with a motorist who had a green light.
  • Rear-end collisions. We might use EDR data to show a motorist in front of you brake checked, meaning they stopped for no reason in the road, causing you to crash into them. As a result, the motorist who brake checked is liable for the accident.
  • T-bone accidents. We can rely on EDR data to show the motorist made a hard left-hand turn right before crashing into the side of your car.
  • Drunk driving accidents. EDR data won’t show whether a driver was drunk. But it might show the motorist did not buckle up, was speeding, and made aggressive steering maneuvers, all of which can support an inference that the driver was impaired.

These are only some of the accidents where EDR data will supplement other evidence, such as witness testimony or dash camera footage.

Cases rarely stand or fall based on EDR data alone. Instead, it works in concert with other evidence, such as your own testimony. An insurance claims adjuster might be skeptical of your claim that you weren’t speeding. But EDR data can back up your story. A claims adjuster might find EDR data more believable than your own version of events.

Obtaining the Other Motorist’s Black Box Data

We must move quickly to get the data. For one thing, you don’t have an automatic right to access it. True, the driver might consent and turn the information over. But you cannot break into the vehicle or demand that they turn it over. They are not punished for refusing.

We might need a court order to seek access to another driver’s black box data. An experienced lawyer can also notify the driver to preserve this data and not erase it. This step is necessary. If they go ahead and “lose” the data, a court might penalize them.

Contact Swilley Law Firm quickly. There is no time to lose. We can work with mechanics to understand the data and how it fleshes out certain aspects of your accident. Also, remember not to get your car fixed immediately. We don’t want a mechanic to accidentally erase the data on your vehicle.

Is the Black Box Data Ever Wrong?

Possibly. Sometimes there are problems with the device, so certain readings might not be accurate. Sensors that feed data to the EDR might also be faulty. We always compare what the data tells us to what witnesses have reported happening at the scene.

Speak with a Florence Car Accident Attorney

The strongest accident claims have the most up-to-date and compelling evidence. Contact Swilley Law Firm to review what happened. We can begin the steps of securing access to different black box data, as well as search for other evidence, like a security camera that recorded the crash. Our consultations are free to those injured in the 29501 zip code, so reach out to our office by phone or online.

Have any questions?

Our experienced team is dedicated to guiding you through the legal process and fighting for the justice you deserve
How much time do I have to file a personal injury lawsuit?

You have three years to file a personal injury lawsuit in South Carolina. A claim against the government must be started in two years. You don’t have to complete the case in that timeframe. You can meet the deadline by just one day and still receive your compensation. However, it’s always best to talk to a lawyer as soon as possible.

What is my personal injury case worth?

A personal injury case may seek compensation for economic loss, like medical bills, and personal loss, like pain and suffering. There are many types of losses that a person may have with a personal injury. These losses can be claimed as compensation. What your personal injury case is worth depends on several factors – the losses you have, how fault is assigned, and sources of compensation.

What is the difference between a felony and a misdemeanor?

Felonies are usually more serious offenses than misdemeanors. But each offense has its own maximum incarceration and other penalties.

Generally, felonies carry longer potential jail time than misdemeanors. In addition, felonies may result in the loss of rights, such as firearm possession and voting rights, that are not lost with misdemeanors.

How does the criminal defense process work in SC?

The criminal defense process begins when a person is charged with a crime. The person may be arrested, informed of the charges, or summoned to court. At the first hearing, the person pleads guilty or not guilty. The court may impose conditions on the bond.

More serious offenses begin with a preliminary hearing. There may also be a pre-trial conference and motion hearings, and the parties may discuss a plea bargain.

Available 24/7 • 100% Secure and Confidential

"*" indicates required fields