Question 1

What can a car actually tell us?

Accepted Answer

Often a great deal: which phones were paired to it and when, and frequently copies of those phones' contacts, calls and messages; the destinations and journeys entered into its navigation; door, ignition, gear and speed events from its modules; and, on many vehicles, the seconds around a collision (§3). But it varies enormously by make and model, so the honest first step is to establish what this particular vehicle records and what can be extracted (§5).

Question 2

Does the car prove who was driving?

Accepted Answer

No, and this is the key limit: the car records the vehicle and the paired device, not the person (§6, Example 1). It can show a phone was in the car and where the car went, but attribution to a driver or passenger requires corroboration, usually the paired phone's own records placing it with a person. The honest finding is stated at the level the evidence supports: the car places the device, the phone places the person.

Question 3

The car has been driven since. Is the data gone?

Accepted Answer

Some of it may be: continued use overwrites journey history, changes the paired-device list and cycles event buffers (§5). But the telematics or connected-car cloud is a separate source with its own retention and often holds the journeys the car itself has overwritten (§4, Example 2), and the paired phone holds the originals of the copied data. Preserve promptly, but a used car is not always a lost case.

Question 4

Can we get the journey data from any where other than the car?

Accepted Answer

Yes: the manufacturer's connected-car cloud and the insurer's telematics black box both record journeys, locations and status independently of the vehicle, reachable through the owner's account or the provider by lawful request (§4, §8). The companion app on the phone mirrors much of it too. These cloud sources often outlast the car's own overwriting history, which is why they are preserved in parallel.

Question 5

Is the collision data reliable?

Accepted Answer

Where a vehicle has an event data recorder, its record of the seconds around a crash, speed, braking, impact, is objective and powerful (§3, Example 3), extracted with specialist tools and documented. Its limits are honest: it records that vehicle's dynamics, not the other driver's intentions, and its clock is checked and reconciled. Presented within those limits, it resolves the mechanics of a collision that eyewitness accounts cannot.

Question 6

What about the privacy of passengers whose phones were paired?

Accepted Answer

It must be respected: a car often copies the contacts, call logs and messages of every phone paired to it, including passengers', so vehicle data can contain third parties' personal data (§7). Its collection, disclosure and use engage the UK GDPR, and that third-party data is handled with minimisation and protected, disclosing the relevant material and shielding the rest, much as with any device holding others' private information. cflab. u k · e-disc ove r y. u k ©2026 Computer Forensics Lab Ltd ·cflab.uk ·e-discovery.uk ·info@cflab.uk ·+44 (0)20 7164 6915 Page 15 of 17

Vehicle Infotainment And Telematics Forensics