Privacy and security controls should be reviewed vehicle by vehicle. Connected cars, companion apps, infotainment profiles, telematics, cameras, toll devices, and aftermarket equipment can create different data and access paths. A household needs one inventory of those paths, plus a repeatable process for driver changes, service visits, sales, and account recovery.
Build a vehicle-and-account map
Create one row for every vehicle. Record the manufacturer account, companion app, primary and secondary drivers, paired phones, saved profiles, digital keys, payment methods, location or trip services, insurance devices, toll tags, dash cameras, diagnostic adapters, and other connected equipment. Name the owner and backup owner of each account.
The FTC says connected cars can collect sensitive information including location, biometric, telematic, video, and other personal data. NHTSA describes modern vehicles as connected software and electronic systems with wireless and wired entry points. The exact data varies by vehicle and service, so use the manufacturer and provider notices for the specific model and account.
Minimize persistent driver data
Review what the vehicle stores after each driver leaves: home and work addresses, recent destinations, contacts, call records, messages, garage-door codes, media accounts, voice history, Wi-Fi credentials, seat profiles, and charging or fueling preferences. Disable synchronization that the household does not need and use separate driver profiles where available.
Do not assume that deleting a phone pairing removes the profile, destinations, or provider-side account data. Test each layer separately: phone, vehicle, companion app, and online account. When a guest or temporary driver no longer needs access, remove that access promptly and verify that a digital key or app session no longer works.
Protect connected and aftermarket devices
Keep vehicle, app, and accessory software current through documented channels. Avoid unknown diagnostic or entertainment devices that request broad permissions. NHTSA promotes a layered cybersecurity approach that considers wireless and wired entry points, detection, response, resilient design, and recovery. Its guidance also addresses risks introduced by third-party and aftermarket equipment.
For every device, record who installed it, what it can read or control, where its data goes, how it updates, and how it is removed. A device used for insurance, fleet tracking, diagnostics, or a teen driver may create a different data relationship from the manufacturer account.
Control location and household access
Decide which people may view live location, trip history, charging status, cabin images, or driving behavior. Use individual accounts and role controls when available. Review shared email groups, password managers, and recovery numbers so a former household member cannot regain access.
Treat unexpected digital-key invitations, password resets, location-sharing changes, and new-device alerts as events to verify through the known app or manufacturer site. Do not approve a new connection while driving. If an event may affect safe operation, stop using the feature and follow the manufacturer or qualified service provider's documented process.
Prepare for service, rental, sale, or transfer
Before service or a valet handoff, remove unnecessary personal items and use a restricted profile or valet mode if the specific vehicle documents one. Do not give a master account password to a shop. After the handoff, review paired devices and access lists.
Before selling, returning, donating, or transferring a vehicle, follow the manufacturer procedure to remove accounts, profiles, digital keys, addresses, paired phones, media services, and payment information. The FTC specifically reminds consumers to wipe data from connected cars before sale. Also remove the vehicle from companion and household accounts and confirm that the new owner cannot see prior data.
Review all vehicles on the same date
Once or twice a year, use the same checklist for every household vehicle. Compare account owners, recovery methods, active drivers, connected devices, software status, data-sharing choices, and transfer instructions. Record unknowns for follow-up rather than copying settings from one model to another.
A strong household plan does not assume all vehicles collect the same data. It identifies the connected surfaces for each vehicle, limits access to current drivers, protects sensitive location and profile information, and makes removal part of every service or ownership handoff.
Sources
- Vehicle Cybersecurity — National Highway Traffic Safety Administration
- Cybersecurity Best Practices for the Safety of Modern Vehicles — National Highway Traffic Safety Administration, Sept. 1, 2022
- Cars and Consumer Data: On Unlawful Collection and Use — Federal Trade Commission, May 14, 2024