Cars collect up to 25 GB of data per hour

A BBC Future investigation finds that many new‑model cars record up to 25 GB of data per hour – a mix of GPS location, acceleration, braking, engine performance and voice‑command transcripts – and routinely upload the stream to the maker’s servers [BBC Future].

How manufacturers use the data

The report shows manufacturers analyse the telemetry to fine‑tune engine maps, improve crash‑avoidance algorithms and tailor in‑car services such as infotainment recommendations. In several cases, the data feed directly into over‑the‑air software updates that adjust vehicle behaviour without driver intervention.

Privacy implications

Because the data includes precise routes and spoken interactions, it can reveal daily routines, home addresses and personal conversations. The BBC notes that the sheer volume and granularity increase the risk of unauthorized access, especially when third‑party suppliers host the cloud back‑ends. A handful of firms have responded by adding driver‑controlled toggles that disable non‑essential telemetry and by encrypting data at rest, but the report finds that most users remain unaware of what is being sent.

Regulatory context

European regulators have begun drafting stricter vehicle‑data rules, and the UK’s Information Commissioner’s Office has issued guidance urging manufacturers to obtain explicit consent for any data that can identify an individual. The BBC cites a German automaker that now includes a clear opt‑in screen on the dashboard, marking one of the first concrete steps toward compliance.

The growing data pipeline in cars underscores the need for transparent consent mechanisms and robust security standards. As vehicles become rolling data hubs, the balance between innovation and privacy will hinge on how quickly the industry adopts clear, enforceable safeguards.