Modern cars are computers on wheels that send home nonstop telemetry about you. In this post I remove my 2024 RAV4 Hybrid's modem and GPS to
Modern cars are computers on wheels - they have more sensors than you can count and are constantly phoning home with telemetry data like your location, speed, fuel levels, sudden accelerations/decelerations, video footage, driver attention data from eye monitoring systems, and hundreds of other data points. Cars have inward- and outward-facing cameras. They have microphones. They have always-on modems. It’s all enabled by default with difficult or meaningless opt-outs, and your data is monetized through brokers like LexisNexis or Verisk. This all brings a host of security and privacy issues - here are some over the years:
In 2025 Subaru had vulnerabilities allowing anyone to remotely unlock customers’ cars, as well as access the real-time GPS location and location history of the car of the car
Car manufacturers share your driving data with insurance companies, which then increase your premiums
In 2023 Tesla employees internally shared camera footage of naked customers and other sensitive images
In 2015 Charlie Miller and Chris Valasek famously took over a Jeep Cherokee with full control of the ignition, brakes, locks, steering, etc.
Mozilla detailed how 25 car manufacturers scored abysmally on privacy and how they collect data including “sexual activity, immigration status, race, facial expressions, weight and genetic information.” They sell this data to third parties and use it to build profiles about you covering “intelligence, abilities, characteristics, preferences, and more.”
Tesla had a vulnerability in 2017 that allowed anyone to remotely see your car’s location, manage other features, and even summon the car to themselves
The Car That Watches You Back details how cars are now serving you ads, as well as collecting vast amounts of data about you. The Hacker News discussion about this article is what prompted this blog post
Now that we’re sufficiently motivated, what can we do about it?...














