Asger Risom
Modern cars are packed with sensors that monitor your acceleration, braking, and cornering. But as drivers are quickly discovering, automakers are increasingly sharing that telemetry with insurance companies, turning your dashboard into a financial liability.
Every time you slam on the brakes to avoid a squirrel, your car notices. Modern vehicles are packed with sensors that monitor wheel speed, steering angle, and pedal pressure to keep you alive on the highway. But according to a recent piece by Motor1, those exact same sensors are increasingly being used to build a permanent, highly judgmental profile of how you drive.
And depending on the permissions buried in your connected-car app, your vehicle might be handing that profile straight to your insurance company.
What the algorithm thinks “aggressive” means
To a human, defensive driving requires context. If traffic suddenly stops, you hit the brakes hard. But a car’s onboard telemetry system doesn’t see the traffic jam; it just logs a “harsh braking event.”
Telematics systems look for a few specific data points to calculate a risk score: rapid acceleration, sharp cornering, and sudden deceleration. If you repeatedly trigger those thresholds, the algorithm categorizes you as an aggressive driver.
This data is the backbone of usage-based insurance programs, which promise lower premiums for safe drivers. But as motorists are quickly discovering, the reality of algorithmic grading is incredibly frustrating.
The backlash against telematics
If you want to see how this technology is actually playing out on the road, just look at the online discourse. The forums are full of drivers realizing that their car’s telemetry doesn’t understand the real world.
In r/Insurance, drivers regularly vent about tracking devices penalizing them for entirely normal traffic situations. One driver noted that hitting the brakes to avoid running a yellow light at 45 mph can trigger severe penalties on their record. To the driver, stopping was a responsible, evasive decision; to the computer, it was just reckless deceleration.
But the bigger concern isn’t the plug-in dongles that drivers voluntarily use—it’s the cars themselves. In a massive r/cars discussion, users highlighted how major automakers are actively sharing connected-car data with third-party data brokers like LexisNexis. Those brokers then generate consumer risk profiles for insurance companies. Many drivers have no idea this is happening until their premium suddenly skyrockets, only to discover they accidentally opted in by agreeing to a 50-page terms of service agreement on their car’s infotainment screen.
How to stop the data leak
The fact that your car can measure your cornering G-force doesn’t mean it has to report it.
The most effective way to protect your insurance premium is to dig into your vehicle’s connected-services settings. Check exactly what permissions you have granted to the manufacturer’s smartphone app. You are looking for any clauses related to “driving data,” “third-party sharing,” or “usage-based insurance.”
You can’t stop your car from knowing how hard you hit the brakes. But you can absolutely stop it from telling anyone else.
